Publications

Last update: Jan 5, 2024

Original Papers

Proceedings

Reviews

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Original Papers

2024

1. Composition, time, temperature, and annealing-process dependences of crystalline and amorphous phases in ductile semiconductors Ag2S1-xTez with x = 0.3-0.6

K. Sato, K. Hirata, M. Matsunami, and T. Takeuchi

AIP Adv. 14, 015303 (2024) [9 pages].

2023

1. Improvement of thermoelectric performance of flexible compound Ag2S0.55Se0.45 by means of partial V-substitution for Ag

K. Sato, S. Singh, I. Yamazaki, K. Hirata, A. K. Ang, M. Matsunami, and T. Takeuchi

AIP Adv. 13, 125206 (2023) [9 pages].

1. Huge Peltier conductivity in valence fluctuating material Yb3Si5

K. Kuga, K. Hirata, M. Matsunami, and T. Takeuchi

Appl. Phys. Lett. 123, 202201 (2023) [5 pages].

1. Reduction of working temperature for the large magnitude in thermoelectric dimensionless figure of merit of Ag2-xCuxS

K. Sato, G. Kim, K. Murase, S. Singh, K. Hirata, D. Byeon, M. Matsunami, and T. Takeuchi

Jpn. J. Appl. Phys. 62, 111002 (2023) [8 pages]. (Spotlights 2023)

1. Development of Cu2Se/Ag2(S,Se)-Based Monolithic Thermoelectric Generators for Low-Grade Waste Heat Energy Harvesting

A. K. R. Ang, I. Yamazaki, K. Hirata, S. Singh, M. Matsunami, and T. Takeuchi

ACS Appl. Mater. Interfaces 15, 46962 (2023) [9 pages].

1. Thermoelectric performance of Fe2V0.9W0.1Al thin films deposited on n-type Si substrates

F. Machda, S. Singh, K. Kuga, A. K. R. Ang, M. Matsunami, and T. Takeuchi

Jpn. J. Appl. Phys. 62, 055502 (2023) [8 pages].

1. Magneto-thermal conductivity effect and enhanced thermoelectric figure of merit in Ag2Te

K. Hirata, K. Kuga, M. Matsunami, M. Zhu, J. P. Heremans, and T. Takeuchi

AIP Adv. 13, 015016 (2023) [9 pages]. (Featured on the cover of ADV's January 2023 issue.)

2022

1. Electronic structure of silver chalcogenides investigated by hard x-ray photoemission spectroscopy and density functional theory calculations

K. Sato, K. Hirata, S. Singh, K. Kuga, F. Ogawa, M. Matsunami, and T. Takeuchi

J. Appl. Phys. 132, 045104 (2022) [5 pages].

1. Observation of Thickness-Dependent Exchange Interaction in EuO Ultrathin Films

H. Miyazaki, T. Hajiri, M. Matsunami, T. Ito, and S. Kimura

Front. Nanotechnol. 4, 872717 (2022) [6 pages].

2021

1. Synergetic Enhancement of the Power Factor and Suppression of Lattice Thermal Conductivity via Electronic Structure Modification and Nanostructuring on a Ni- and B-Codoped p-Type Si-Ge Alloy for Thermoelectric Application

O. Muthusamy, S. Singh, K. Hirata, K. Kuga, S. K. Harish, M. Shimomura, M. Adachi, Y. Yamamoto, M. Matsunami, and T. Takeuchi

ACS Appl. Electron. Mater. 3, 5621-5631 (2021) [11 pages].

1. Simultaneous enhancements of thermopower and electrical conductivity in quasi-one-dimensional α-YbAlB4 single crystal

K. Kuga, M. Matsunami, S. Singh, S. Nakatsuji, and T. Takeuchi

Appl. Phys. Lett. 119, 223905 (2021) [6 pages].

1. Capacitor-Type Thin-Film Heat Flow Switching Device

K. Hirata, T. Matsunaga, S. Singh, M. Matsunami, and T. Takeuchi

Jpn. J. Appl. Phys. 60, 124004 (2021) [7 pages].

1. Mixed-phase effect of the high Seebeck coefficient and low electrical resistivity in the Ag2S

G. Kim. D. Byeon, S. Singh, K. Hirata, S. Choi, M. Matsunami, and T. Takeuchi

J. Phys. D: Appl. Phys. 54, 115503 (2021) [7 pages].

1. A Field Effect Heat Flow Switching Device

T. Matsunaga, K. Hirata, S. Singh, M. Matsunami, and T. Takeuchi

Mater. Trans. 62, 16-19 (2021) [4 pages].

2020

1. Development of High-Performance Solid-State Thermal Diodes Using Unusual Behavior of Thermal Conductivity Observed for Ag2Ch (Ch = S, Se, Te)

K. Hirata, T. Matsunaga, S. Singh, M. Matsunami, and T. Takeuchi

Mater. Trans. 61, 2402-2406 (2020) [5 pages].

1. Crossover in periodic length dependence of thermal conductivity in 5d element substituted Fe2VAl-based superlattices

S. Choi, S. Hiroi, M. Inukai, S. Nishino, R. Sobota, D. Byeon, M. Mikami, E. Minamitani, M. Matsunami, and T. Takeuchi

Phys. Rev. B 102, 104301 (2020) [10 pages].

1. Effects of 5d-heavy element partial substitution on thermal transport in Fe2VAl thin films

S. Choi, S. Hiroi, M. Inukai, S. Nishino, R. Sobota, D. Byeon, M. Mikami, M. Matsunami, and T. Takeuchi

Phys. Rev. B 101, 104312 (2020) [8 pages].

1. Dynamical variation of carrier concentration and colossal Seebeck effect in Cu2S low-temperature phase

D. Byeon, R. Sobota, K. Hirata, S. Singh, S. Choi, M. Adachi, Y. Yamamoto, M. Matsunami, and T. Takeuchi

J. Alloys Compd. 826, 154155 (2020) [6 pages].

1. Hard x-ray photoemission spectroscopy of rhenium substituted higher manganese silicides

M. Matsunami, T. Iizuka, S. Ghodke, A. Yamamoto, H. Miyazaki, and T. Takeuchi

J. Appl. Phys. 127, 053103 (2020) [5 pages].

1. Thermoelectric Properties of Yb5Si3

T. Iizuka, T. Hori, M. Matsunami, and T. Takeuchi

Jpn. J. Appl. Phys. 59, 010902 (2020) [3 pages].

2019

1. Au and B co-doped p-type Si-Ge nanocomposites possessing ZT = 1.63 synthesized by ball milling and low-temperature sintering

M. Omprakash, K. Delime-Codrin, S. Ghodke, S. Singh, S. Nishino, Y. Yamamoto, M. Matsunami, H. Santhanakrishnan, M. Shimomura, and T. Takeuchi

Jpn. J. Appl. Phys. 58, 125501 (2019) [9 pages].

1. Phase Diagram of Bi2Sr2CaCu2O8+δ Constructed on Basis of Electronic Structure Investigations

R. Sobota, N. Kubo, M. Matsunami, and T. Takeuchi

J. Phys. Soc. Jpn. 88, 064711 (2019) [7 pages].

1. Large figure of merit ZT = 1.88 at 873 K achieved with nanostructured Si0.55Ge0.35(P0.10Fe0.01)

K. Delime-Codrin, M. Omprakash, S. Ghodke, R. Sobota, M. Adachi, M. Kiyama, T. Matsuura, Y. Yamamoto, M. Matsunami, and T. Takeuchi

Appl. Phys. Express 12, 045507 (2019) [6 pages].

1. Discovery of Colossal Seebeck Effect in Metallic Cu2Se

D. Byeon, R. Sobota, K. Delime-Codrin, S. Choi, K. Hirata, M. Adachi, M. Kiyama, T. Matsuura, Y. Yamamoto, M. Matsunami, and T. Takeuchi

Nat. Commun. 10, 72 (2019) [7 pages].

1. Direct observation of pseudo-gap electronic structure in the Heusler-type Fe2VAl thin film

H. Miyazaki, S. Tateishi, M. Matsunami, K. Soda, S. Yamada, K. Hamaya, and Y. Nishino

J. Electron Spectrosc. Rel. Phenom. 232, 1 (2019) [4 pages].

2018

1. Effective Decrease of the Thermal Conductivity Caused by Hf in Fe(V0.955-xHf0.045Tix)Sb Half-Heusler Phase

K. Delime-Codrin, G. Swapnil, D. Byeon, R. Sobota, M. Matsunami and T. Takeuchi

Mater. Trans. 59, 1637 (2018) [8 pages].

1. Change of Fermi surface states related with two different Tc-rising mechanisms in iron pnictide superconductors

A. Takemori, T. Hajiri, S. Miyasaka, Z. H. Tin, T. Adachi, S. Ideta, K. Tanaka, M. Matsunami, and S. Tajima

Phys. Rev. B 98, 100501(R) (2018) [5 pages].

1. Quantum valence criticality in a correlated metal

K. Kuga, Y. Matsumoto, M. Okawa, S. Suzuki, T. Tomita, K. Sone, Y. Shimura, T. Sakakibara, D. Hamane, Y. Karaki, Y. Takata, M. Matsunami, R. Eguchi, M. Taguchi, A. Chainani, S. Shin, K. Tamasaku, Y. Nishino, M. Yabashi, T. Ishikawa and S. Nakatsuji

Science Adv. 4, eaao3547 (2018) [7 pages].

2017

1. Direct observation of heterogeneous valence state in Yb-based quasicrystalline approximants

M. Matsunami, M. Oura, K. Tamasaku, T. Ishikawa, S. Ideta, K. Tanaka, T. Takeuchi, T. Yamada, A. P. Tsai, K. Imura, K. Deguchi, N. K. Sato, and T. Ishimasa

Phys. Rev. B 96, 241102(R) (2017) [4 pages]. (arXiv:1712.04113)

1. Carrier concentration dependence of thermoelectric properties of Fe(V1-x,Tix)Sb half-Heusler phase

K. Delime-Codrin, T. Yamada, A. Yamamoto, R. Sobota, M. Matsunami, and T. Takeuchi

Jpn. J. Appl. Phys. 56, 111202 (2017) [5 pages].

1. Hole-phonon coupling effect on the band dispersion of organic molecular semiconductors

F. Bussolotti, J. Yang, T. Yamaguchi, K. Sato, M. Matsunami, K. Tanaka, Y. Nakayama, H. Ishii, N. Ueno, and S. Kera

Nat. Commun. 8, 173 (2017) [7 pages].

1. First Observation of Heavy-Fermion Nature in Ce-based Icosahedral Approximant

K. Imura, K. Nobe, K. Deguchi, M. Matsunami, H. Miyazaki, A. Yasui, E. Ikenaga, and N. K. Sato

J. Phys. Soc. Jpn. 86, 093702 (2017) [4 pages].

1. Large-Gap Magnetic Topological Heterostructure Formed by Subsurface Incorporation of a Ferromagnetic Layer

T. Hirahara, S. V. Eremeev, T. Shirasawa, Y. Okuyama, T. Kubo, R. Nakanishi, R. Akiyama, A. Takayama, T. Hajiri, S. Ideta, M. Matsunami, K. Sumida, K. Miyamoto, Y. Takagi, K. Tanaka, T. Okuda, T. Yokoyama, S. Kimura, S. Hasegawa, and E. V. Chulkov

Nano Lett. 17, 3493 (2017) [8 pages].

1. Single Crystal Pentacene Valence Band Dispersion and its Temperature Dependence

Y. Nakayama, Y. Mizuno, M. Hikasa, M. Yamamoto, M. Matsunami, S. Ideta, K. Tanaka, H. Ishii, and N. Ueno

J. Phys. Chem. Lett. 8, 12559 (2017) [6 pages].

2016

1. Time-resolved HAXPES using a microfocused XFEL beam: From vacuum space-charge effects to intrinsic charge-carrier recombination dynamics

L.-P. Oloff, A. Chainani, M. Matsunami, K. Takahashi, T. Togashi, H. Osawa, K. Hanff, A. Quer, R. Matsushita, R. Shiraishi, M. Nagashima, A. Kimura, K. Matsuishi, M. Yabashi, Y. Tanaka, G. Rossi, T. Ishikawa, K. Rossnagel, and M. Oura

Sci. Rep. 6, 35087 (2016) [10 pages].

1. Carrier Concentration Dependence of Superconducting Gap of Bi2(Sr, La)2CuO6+δ

H. Sakamoto, K. Ogawa, T. Kondo, S. Shin, M. Matsunami, H. Ikuta, and T. Takeuchi

J. Phys. Soc. Jpn. 85, 104710 (2016) [7 Pages].

1. Surface Kondo effect and non-trivial metallic state of the Kondo insulator YbB12

K. Hagiwara, Y. Ohtsubo, M. Matsunami, S. Ideta, K. Tanaka, H. Miyazaki, J. E. Rault, P. L. Fevre, F. Bertran, A. Taleb-Ibrahimi, R. Yukawa, M. Kobayashi, K. Horiba, H. Kumigashira, K. Sumida, T. Okuda, F. Iga, and S. Kimura

Nat. Commun. 7, 12690 (2016) [7 pages].

1. Thermoelectric Properties of Al-Mn-Si Based C54 Phase Containing Small Amount of C40 Phase

A. Yamamoto, S. Ghodke, H. Miyazaki, Y. Nishino, M. Matsunami and T. Takeuchi

Mater. Trans. 57, 1055 (2016) [4 pages].

1. Enhanced thermoelectric properties of W and Fe substituted MnSiγ

S. Ghodke, N. Hiroishi, A. Yamamoto, H. Ikuta, M. Matsunami, and T. Takeuchi

J. Electron. Mater. 45, 5279 (2016) [6 pages].

1. Slater to Mott Crossover in the Metal to Insulator Transition of Nd2Ir2O7

M. Nakayama, Takeshi Kondo, Z. Tian, J.J. Ishikawa, M. Halim, C. Bareille, W. Malaeb, K. Kuroda, T. Tomita, S. Ideta, K. Tanaka, M. Matsunami, S. Kimura, N. Inami, K. Ono, H. Kumigashira, L. Balents, S. Nakatsuji, and S. Shin

Phys. Rev. Lett. 117, 056403 (2016) [5 pages]. (Editors' Suggestion)

1. Electronic structure of LaTe and CeTe

A. Chainani, M. Oura, M. Matsunami, A. Ochiai, T. Takahashi, Y. Tanaka, K. Tamasaku, Y. Kohmura, and T. Ishikawa

J. Electron Spectrosc. Rel. Phenom. 208, 116 (2016) [5 pages].

1. Thermoelectric properties of supersaturated Re solid solution of higher manganese silicides

A. Yamamoto, S. Ghodke, H. Miyazaki, M. Inukai, Y. Nishino, M. Matsunami, and T. Takeuchi

Jpn. J. Appl. Phys. 55, 020301 (2016) [4 pages].

1. Orbital-dependent electron correlation in LiFeAs revealed by angle-resolved photoemission spectroscopy

T. Hajiri, T. Ito, M. Matsunami, B. H. Min, Y. S. Kwon, and S. Kimura

Phys. Rev. B 93, 024503 (2016) [5 pages].

2015

1. Temperature Dependence of Magnetically Active Charge Excitations in Magnetite across the Verwey Transition

M. Taguchi, A. Chainani, S. Ueda, M. Matsunami, Y. Ishida, R. Eguchi, S. Tsuda, Y. Takata, M. Yabashi, K. Tamasaku, Y. Nishino, T. Ishikawa, H. Daimon, S. Todo, H. Tanaka, M. Oura, Y. Senba, H. Ohashi, and S. Shin

Phys. Rev. Lett. 115, 256405 (2015) [5 pages].

1. Surface Tomonaga-Luttinger-Liquid State on Bi/InSb(001)

Y. Ohtsubo, J. Kishi, K. Hagiwara, P. L. Fevre, F. Bertran, A. Taleb-Ibrahimi, H. Yamane, S. Ideta, M. Matsunami, K. Tanaka, and S. Kimura

Phys. Rev. Lett. 115, 256404 (2015) [5 pages].

1. Quadratic Fermi node in a 3D strongly correlated semimetal

Takeshi Kondo, M. Nakayama, R. Chen, J. J. Ishikawa, E.-G. Moon, T. Yamamoto, Y. Ota, W. Malaeb, H. Kanai, Y. Nakashima, Y. Ishida, R. Yoshida, H. Yamamoto, M. Matsunami, S. Kimura, N. Inami, K. Ono, H. Kumigashira, S. Nakatsuji, L. Balents, and S. Shin

Nat. Commun. 6, 10042 (2015) [9 pages].

1. Electronic Structure Evolution across the Peierls Metal-Insulator Transition in a Correlated Ferromagnet

P. A. Bhobe, A. Kumar, M. Taguchi, R. Eguchi, M. Matsunami, Y. Takata, A. K. Nandy, P. Mahadevan, D. D. Sarma, A. Neroni, E. Sasioglu, M. Lezaic, M. Oura, Y. Senba, H. Ohashi, K. Ishizaka, M. Okawa, S. Shin, K. Tamasaku, Y. Kohmura, M. Yabashi, T. Ishikawa, K. Hasegawa, M. Isobe, Y. Ueda, and A. Chainani

Phys. Rev. X 5, 041004 (2015) [9 pages].

1. Role of Quantum and Surface-State Effects in the Bulk Fermi-Level Position of Ultrathin Bi Films

T. Hirahara, T. Shirai, A. Takayama, T. Hajiri, M. Matsunami, K. Tanaka, S. Kimura, S. Hasegawa, and K. Kobayashi

Phys. Rev. Lett. 115, 106803 (2015) [5 pages].

1. Electronic structure of Mott-insulator CaCu3Ti4O12: Photoemission and inverse photoemission study

H. J. Im, M. Iwataki, S. Yamazaki, T. Usui, S. Adachi, M. Tsunekawa, T. Watanabe, K. Takegahara, S. Kimura, M. Matsunami, and H. Sato

Solid State Commun. 217, 17-20 (2015) [4 pages].

2014

1. Time-resolved HAXPES at SACLA: Probe and pump pulse-induced space-charge effects

L.-P. Oloff, M. Oura, K. Rossnagel, A. Chainani, M. Matsunami, R. Eguchi, T. Kiss, T. Yamaguchi, Y. Nakatani, J. Miyawaki, M. Taguchi, K. Yamagami, T. Togashi, T. Katayama, K. Ogawa, M. Yabashi, and T. Ishikawa

New Journal of Physics 16, 123045 (2014) [15 pages].

1. Anomalous Superconducting-Gap Structure of Slightly Overdoped Ba(Fe1-xCox)2As2

T. Hajiri, T. Ito, M. Matsunami, B. H. Min, Y. S. Kwon, and S. Kimura

J. Phys. Soc. Jpn. 83, 093703 (2014) [4 pages].

1. Electronic structure of CeCuAs2

A. Chainani, M. Matsunami, M. Taguchi, R. Eguchi, Y. Takata, M. Oura, S. Shin, K. Sengupta, E. V. Sampathkumaran, Th. Doert, Y. Senba, H. Ohashi, K. Tamasaku, Y. Kohmura, M. Yabashi, and T. Ishikawa

Phys. Rev. B 89, 235117 (2014) [8 pages].

1. Electronic and Local Crystal Structures of the ZrNiSn Half-Heusler Thermoelectric Material

H. Miyazaki, T. Nakano, M. Inukai, K. Soda, Y. Izumi, T. Muro, J. Kim, M. Takata, M. Matsunami, S. Kimura, and Y. Nishino

Mater. Trans. 55, 1209 (2014) [6 pages].

1. Soft X-ray photoelectron spectroscopy study of Fe2P (0001)

Y. Sugizaki, S. Ishida, Y. Kakefuda, K. Edamoto, M. Matsunami, T. Hajiri, and S. Kimura

Surf. Sci. 624, 21 (2014) [4 pages].

1. Angle-resolved photoemission study of the electronic structure of the quantum spin liquid EtMe3Sb[Pd(dmit)2]2

Q. Q. Ge, H. C. Xu, X. P. Shen, M. Xia, B. P. Xie, F. Chen, Y. Zhang, R. Kato, T. Tsumuraya, T. Miyazaki, M. Matsunami, S. Kimura, and D. L. Feng

Phys. Rev. B 89, 075105 (2014) [6 pages].

1. Development of a single-shot CCD-based data acquisition system for time-resolved x-ray photoelectron spectroscopy at an x-ray free electron laser facility

M. Oura, T. Wagai, A. Chainani, J. Miyawaki, H. Sato, M. Matsunami, R. Eguchi, T. Kiss, T. Yamaguchi, Y. Nakatani, T. Togashi, T. Katayama, K. Ogawa, M. Yabashi, Y. Tanaka, Y. Kohmura, K. Tamasaku, S. Shin, and T. Ishikawa

J. Synchrotron Rad. 21, 183-192 (2014) [10 pages].

2013

1. Three-Dimensional Angle-Resolved Photoemission Spectra of EuO Thin Film

H. Miyazaki, H. Mitani, T. Hajiri, M. Matsunami, T. Ito, and S. Kimura

J. Electron Spectrosc. Rel. Phenom. 191, 7 (2013) [4 pages].

1. Strong correlation effects in the A-site ordered perovskite CaCu3Ti4O12 revealed by angle-resolved photoemission spectroscopy

H. J. Im, M. Tsunekawa, T. Sakurada, M. Iwataki, K. Kawata, T. Watanabe, K. Takegahara, H. Miyazaki, M. Matsunami, T. Hajiri, and S. Kimura

Phys. Rev. B 88, 205133 (2013) [5 pages].

1. Microscopic mechanism for asymmetric charge distribution in Rashba-type surface states and the origin of the energy splitting scale

B. Kim, P. Kim, W. Jung, Y. Kim, Y. Koh, W. Kyung, J. Park, M. Matsunami, S. Kimura, J. S. Kim, J. H. Han, and C. Kim

Phys. Rev. B 88, 205408 (2013) [7 pages].

1. An investigation of electron-phonon coupling via phonon dispersion measurements in graphite using angle-resolved photoelectron spectroscopy

S. Tanaka, M. Matsunami, and S. Kimura

Sci. Rep. 3, 3031 (2013) [6 pages].

1. Fermi Level Tuning of Topological Insulator Thin Films

M. Aitani, Y. Sakamoto, T. Hirahara, M. Yamada, H. Miyazaki, M. Matsunami, S. Kimura, S. Hasegawa

Jpn. J. Appl. Phys. 52, 110112 (2013) [8 pages].

1. Strongly hybridized electronic structure of YbAl2: An angle-resolved photoemission study

M. Matsunami, T. Hajiri, H. Miyazaki, M. Kosaka, and S. Kimura

Phys. Rev. B 87, 165141 (2013) [5 pages]. (arXiv:1210.7296)

1. Quantifying covalency and metallicity in correlated compounds undergoing metal-insulator transitions

A. Chainani, A. Yamamoto, M. Matsunami, R. Eguchi, M. Taguchi, Y. Takata, H. Takagi, S. Shin, Y. Nishino, M. Yabashi, K. Tamasaku, and T. Ishikawa

Phys. Rev. B 87, 045108 (2013) [10 pages].

2012

1. Atomic and Electronic Structure of Ultrathin Bi(111) Films Grown on Bi2Te3(111) Substrates: Evidence for a Strain-Induced Topological Phase Transition

T. Hirahara, N. Fukui, T. Shirasawa, M. Yamada, M. Aitani, H. Miyazaki, M. Matsunami, S. Kimura, T. Takahashi, S. Hasegawa, and K. Kobayashi

Phys. Rev. Lett. 109, 227401 (2012) [5 pages].

1. The orbital characters of low-energy electronic structure in iron-chalcogenide superconductor KxFe2-ySe2

F. Chen, Q. Ge, M. Xu, Y. Zhang, X. Shen, W. Li, M. Matsunami, S. Kimura, J. Hu, and D. Feng

Chinese. Sci. Bull. 57, 3829 (2012) [7 pages].

1. Photoemission Evidence for Valence Fluctuations and Kondo Resonance in YbAl2

M. Matsunami, A. Chainani, M. Taguchi, R. Eguchi, Y. Takata, M. Oura, M. Yabashi, K. Tamasaku, Y. Nishino, T. Ishikawa, M. Kosaka, and S. Shin

J. Phys. Soc. Jpn. 81, 073702 (2012) [4 pages]. (arXiv:1206.1689)

1. Pressure suppression of unconventional charge-density-wave state in PrRu4P12 studied by optical conductivity

H. Okamura, N. Ohta, A. Takigawa, I. Matsutori, K. Shoji, K. Miyata, M. Matsunami, H. Sugawara, C. Sekine, I. Shirotani, H. Sato, T. Moriwaki, Y. Ikemoto, Z. Liu, and G. L. Carr

Phys. Rev. B 85, 205116 (2012) [7 pages].

1. Three-dimensional electronic structure and interband nesting in the stoichiometric superconductor LiFeAs

T. Hajiri, T. Ito, R. Niwa, M. Matsunami, B. H. Min, Y. S. Kwon, and S. Kimura

Phys. Rev. B 85, 094509 (2012) [6 pages].

2011

1. Warping effects in the band and angular-momentum structures of the topological insulator Bi2Te3

W. Jung, Y. Kim, B. Kim, Y. Koh, Chul Kim, M. Matsunami, S. Kimura, M. Arita, K. Shimada, J. Han, B. Cho, and Changyoung Kim

Phys. Rev. B 84, 245435 (2011) [6 pages].

1. Kondo Resonance in PrTi2Al20: Photoemission spectroscopy and single-impurity Anderson model

M. Matsunami, M. Taguchi, A. Chainani, R. Eguchi, M. Oura, A. Sakai, S. Nakatsuji, and S. Shin

Phys. Rev. B 84, 193101 (2011) [4 pages]. (arXiv:1108.2122)

1. Optical study of charge instability in CeRu2Al10 in comparison with CeOs2Al10 and CeFe2Al10

S. Kimura, T. Iizuka, H. Miyazaki, T. Hajiri, M. Matsunami, T. Mori, A. Irizawa, Y. Muro, J. Kajino, and T. Takabatake

Phys. Rev. B 84, 165124 (2011) [7 pages].

1. Electronic state of organic molecular magnet: Soft x-ray spectroscopy study of α-TDAE-C60 single crystal

H. Yamaoka, T. Kambe, T. Sato, Y. Ishida, M. Matsunami, R. Eguchi, Y. Senba, H. Ohashi

Phys. Rev. B 84, 161404(R) (2011) [4 pages].

1. Observation of anomalous peaks in the photoelectron spectra of highly oriented pyrolytic graphite: Folding of the band due to the surface charge density wave transition

S. Tanaka, M. Matsunami, and S. Kimura

Phys. Rev. B 84, 121411(R) (2011) [5 pages].

1. Optical Conductivity and Electronic Structure of CeRu4Sb12 under High Pressure

H. Okamura, R. Kitamura, M. Matsunami, H. Sugawara, H. Harima, H. Sato, T. Moriwaki, Y. Ikemoto, and T. Nanba

J. Phys. Soc. Jpn. 80, 084718 (2011) [9 pages].

1. Electronic structure of an antiferromagnetic metal: CaCrO3

P. A. Bhobe, A. Chainani, M. Taguchi, R. Eguchi, M. Matsunami, T. Ohtsuki, K. Ishizaka, M. Okawa, M. Oura, Y. Senba, H. Ohashi, M. Isobe, Y. Ueda, and S. Shin

Phys. Rev. B 83, 165132 (2011) [7 pages].

1. Nodeless superconducting gap in AxFe2Se2 (A=K, Cs) revealed by angle-resolved photoemission spectroscopy

Y. Zhang, L. X. Yang, M. Xu, Z. R. Ye, F. Chen, C. He, H. C. Xu, J. Jiang, B. P. Xie, J. J. Ying, X. F. Wang, X. H. Chen, Jiangping Hu, M. Matsunami, S. Kimura, and D. L. Feng

Nature Materials 10, 273 (2011) [5 pages].

1. Electronic structure of YbGa1.15Si0.85 and YbGaxGe2-x probed by resonant x-ray emission and photoelectron spectroscopies

H. Yamaoka, I. Jarrige, N. Tsujii, M. Imai, J. Lin, M. Matsunami, R. Eguchi, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, M. Taguchi, Y. Senba, H. Ohashi, N. Hiraoka, H. Ishii, and K. D. Tsuei

Phys. Rev. B 83, 104525 (2011) [10 pages].

1. Role of Ti 3d Carriers in Mediating the Ferromagnetism of Co: TiO2 Anatase Thin Films

T. Ohtsuki, A. Chainani, R. Eguchi, M. Matsunami, Y. Takata, M. Taguchi, Y. Nishino, K. Tamasaku, M. Yabashi, T. Ishikawa, M. Oura, Y. Senba, H. Ohashi, T. Hasegawa, and S. Shin

Phys. Rev. Lett. 106, 047602 (2011) [4 pages].

1. Femtosecond core-level photoemision spectroscopy on 1T-TaS2 using a 60-eV laser source

K. Ishizaka, T. Kiss, T. Yamamoto, Y. Ishida, T. Saitoh, M. Matsunami, R. Eguchi, T. Ohtsuki, A. Kosuge, T. Kanai, M. Nohara, H. Takagi, S. Watanabe, and S. Shin

Phys. Rev. B 83, 081104(R) (2011) [4 pages].

2010

1. Absence of nesting in the charge-density-wave system 1T-VS2 as seen by photoelectron spectroscopy

M. Mulazzi, A. Chainani, N. Katayama, R. Eguchi, M. Matsunami, H. Ohashi, Y. Senba, M. Nohara, H. Takagi, and S. Shin

Phys. Rev. B 80, 075130 (2010) [6 pages].

1. Strong Valence Fluctuation in the Quantum Critical Heavy Fermion Superconductor β-YbAlB4: A Hard X-Ray Photoemission Study

M. Okawa, M. Matsunami, K. Ishizaka, R. Eguchi, M. Taguchi, A. Chainani, Y. Takata, M. Yabashi, K. Tamasaku, Y. Nishino, T. Ishikawa, K. Kuga, N. Horie, S. Nakatsuji, and S. Shin

Phys. Rev. Lett. 104, 247201 (2010) [4 pages].

1. Evidence for a Correlated Insulator to Antiferromagnetic Metal Transition in CrN

P. A. Bhobe, A. Chainani, M. Taguchi, T. Takeuchi, R. Eguchi, M. Matsunami, K. Ishizaka, Y. Takata, M. Oura, Y. Senba, H. Ohashi, Y. Nishino, M. Yabashi, K. Tamasaku, T. Ishikawa, K. Takenaka, H. Takagi, and S. Shin

Phys. Rev. Lett. 104, 236404 (2010) [4 pages].

1. Anomalous State Sandwiched between Fermi Liquid and Charge Ordered Mott-Insulating Phases of Ti4O7

M. Taguchi, A. Chainani, M. Matsunami, R. Eguchi, Y. Takata, M. Yabashi, K. Tamasaku, Y. Nishino, T. Ishikawa, S. Tsuda, S. Watanabe, C.-T. Chen, Y. Senba, H. Ohashi, K. Fujiwara, Y. Nakamura, H. Takagi, and S. Shin

Phys. Rev. Lett. 104, 106401 (2010) [4 pages].

1. Determination of Absolute Chirality of Tellurium: Resonant Diffraction with Circularly Polarized X-rays

Y. Tanaka, S. P. Collins, S. W. Lovesey, M. Matsunami, T. Moriwaki, and S. Shin

J. Phys.: Condens. Matter 22, 122201 (2010) [7 pages]. (IOP Select)

1. Kondo scaling of the pseudogap in CeOs4Sb12 and CeFe4P12

P. A. Rayjada, A. Chainani, M. Matsunami, M. Taguchi, S. Tsuda, T. Yokoya, S. Shin, H. Sugawara, and H. Sato

J. Phys.: Condens. Matter 22, 095502 (2010) [8 pages].

1. Resonant Photoemission Spectroscopy of Layered Triangular Lattices Ag2MO2 (M=Ni and Mn); Evidences for M 3d States at Fermi Level

R. Eguchi, H. Yoshida, Y. Okamoto, A. Chainani, M. Matsunami, Y. Ishida, Y. Senba, H. Ohashi, S. Shin, and Z. Hiroi

J. Phys. Soc. Jpn. 79, 0230704 (2010) [4 pages].

2009

1. Pressure Tuning of an Ionic Insulator into a Heavy Electron Metal: An Infrared Study of YbS

M. Matsunami, H. Okamura, A. Ochiai, and T. Nanba

Phys. Rev. Lett. 103, 237202 (2009) [4 pages]. (arXiv:0907.4545)

Selected as Research Highlight (22 February 2010) in NPG Asia Materials, "Heavy-electron metals: Feeling the pressure".

1. Evidence for oxygen holes due to d-p rehybridization in thermoelectric Sr1-xRh2O4

Y. Ishida, T. Baba, R. Eguchi, M. Matsunami, M. Taguchi, A. Chainani, Y. Senba, H. Ohashi, Y. Okamoto, H. Takagi, and S. Shin

Phys. Rev. B 80, 081103(R) (2009) [4 pages].

1. Electronic structure characterization of La2NiMnO6 epitaxial thin films using synchrotron-radiation photoelectron spectroscopy and optical spectroscopy

M. Kitamura, I. Ohkubo, M. Matsunami, K. Horiba, H. Kumigashira, Y. Matsumoto, H. Koinuma, and M. Oshima

Appl. Phys. Lett. 94, 262503 (2009) [3 pages].

1. Spectroscopic Evidence for Competing Reconstructions in Polar Multilayers LaAlO3/LaVO3/LaAlO3

M. Takizawa, Y. Hotta, T. Susaki, Y. Ishida, H. Wadati, Y. Takata, K. Horiba, M. Matsunami, S. Shin, M. Yabashi, K. Tamasaku, N. Nishino, T. Ishikawa, A. Fujimori, and H. Y. Hwang

Phys. Rev. Lett. 102, 236401 (2009) [4 pages].

1. Fermi surfaces, electron-hole asymmetry, and correlation kink in a three-dimensional Fermi liquid LaNiO3

R. Eguchi, A. Chainani, M. Taguchi, M. Matsunami, Y. Ishida, K. Horiba, Y. Senba, H. Ohashi, and S. Shin

Phys. Rev. B 79, 115122 (2009) [6 pages].

1. Structure and photoemission spectroscopy of strain-controlled metal-insulator transition in NdNiO3 thin films

R. Eguchi, Y. Okamoto, Z. Hiroi, S. Shin, A. Chainani, Y. Tanaka, M. Matsunami, Y. Takata, Y. Nishino, K. Tamasaku, M. Yabashi, and T. Ishikawa

J. Appl. Phys. 105, 056103 (2009) [3 pages].

1. Anomalous Duality of 4f Electrons in Filled Skutterudite CeOs4Sb12

M. Matsunami, R. Eguchi, T. Kiss, K. Horiba, A. Chainani, M. Taguchi, K. Yamamoto, T. Togashi, S. Watanabe, X.-Y. Wang, C.-T. Chen, Y. Senba, H. Ohashi, H. Sugawara, H. Sato, H. Harima, and S. Shin

Phys. Rev. Lett. 102, 036403 (2009) [4 pages].

2008

1. Combining photoemission and optical spectroscopies for reliable valence determination in YbS and Yb metal

M. Matsunami, A. Chainani, M. Taguchi, R. Eguchi, Y. Ishida, Y. Takata, H. Okamura, T. Nanba, M. Yabashi, K. Tamasaku, Y. Nishino, T. Ishikawa, Y. Senba, H. Ohashi, N. Tsujii, A. Ochiai, and S. Shin

Phys. Rev. B 78, 195118 (2008) [5 pages]. (Editors' Suggestion) (arXiv:0809.4534)

1. Low power density multihole cathode VHF plasma for mixed phase Si:H thin films

C. Jariwala, A. Chainani, R. Eguchi, M. Matsunami, S. Shin, S. Bhatt, V. Dalal and P.I. John

Appl. Phys. Lett. 93, 191502 (2008) [3 pages].

1. Recoil Effect of Photoelectrons in the Fermi Edge of Simple Metals

Y. Takata, Y. Kayanuma, S. Oshima, S. Tanaka, M. Yabashi, K. Tamasaku, Y. Nishino, M. Matsunami, R. Eguchi, A. Chainani, M. Oura, T. Takeuchi, Y. Senba, H. Ohashi, S. Shin, and T. Ishikawa

Phys. Rev. Lett. 101, 137601 (2008) [4 pages].

1. Photoemission evidence for a Mott-Hubbard metal-insulator transition in VO2

R. Eguchi, M. Taguchi, M. Matsunami, K. Horiba, K. Yamamoto, Y. Ishida, A. Chainani, Y. Takata, M. Yabashi, D. Miwa, Y. Nishino, K. Tamasaku, T. Ishikawa, Y. Senba, H. Ohashi, Y. Muraoka, Z. Hiroi, and S. Shin

Phys. Rev. B 78, 075115 (2008) [6 pages].

1. Electronic structure of FeSi1-xGex investigated by soft x-ray photoelectron spectroscopy complementary to x-ray emission spectroscopy

H. Yamaoka, M. Matsunami, R. Eguchi, Y. Ishida, N. Tsujii, Y. Takahashi, Y. Senba, H. Ohashi, and S. Shin

Phys. Rev. B 78, 045125 (2008) [7 pages].

1. Revisiting the Valence-Band and Core-Level Photoemission Spectra of NiO

M. Taguchi, M. Matsunami, Y. Ishida, R. Eguchi, A. Chainani, Y. Takata, M. Yabashi, K. Tamasaku, Y. Nishino, T. Nishio, T. Ishikawa, Y. Senba, H. Ohashi, and S. Shin

Phys. Rev. Lett. 100, 206401 (2008) [4 pages].

1. Electronic structure of semiconducting CeFe4P12: Strong hybridization and relevance of single-impurity Anderson model

M. Matsunami, K. Horiba, M. Taguchi, K. Yamamoto, A. Chainani, Y. Takata, Y. Senba, H. Ohashi, M. Yabashi, K. Tamasaku, Y. Nishino, D. Miwa, T. Ishikawa, E. Ikenaga, K. Kobayashi, H. Sugawara, H. Sato, H. Harima, and S. Shin

Phys. Rev. B 77, 165126 (2008) [5 pages]. (arXiv:0601114)

1. Coherent and Incoherent Excitations of Electron-Doped SrTiO3

Y. Ishida, R. Eguchi, M. Matsunami, K. Horiba, M. Taguchi, A. Chainani, Y. Senba, H. Ohashi, H. Ohta, and S. Shin

Phys. Rev. Lett. 100, 056401 (2008) [4 pages].

1. Observation of Energy Gap in FeGa3

N. Tsujii, H. Yamaoka, M. Matsunami, R. Eguchi, Y. Ishida, Y. Senba, H. Ohashi, S. Shin, T. Furubayashi, H. Abe, and H. Kitazawa

J. Phys. Soc. Jpn. 77, 024705 (2008) [6 pages].

1. Hard x-ray photoemission study of LaAlO3/LaVO3 multilayers

H. Wadati, Y. Hotta, A. Fujimori, T. Susaki, H. Y. Hwang, Y. Takata, K. Horiba, M. Matsunami, S. Shin, M. Yabashi, K. Tamasaku, Y. Nishino, D. Miwa, and T. Ishikawa

Phys. Rev. B 77, 045122 (2008) [6 pages].

2000 - 2007

1. Universal Scaling in the Dynamical Conductivity of Heavy Fermion Ce and Yb Compounds

H. Okamura, T. Watanabe, M. Matsunami, T. Nishihara, N. Tsujii, T. Ebihara, H. Sugawara, H. Sato, Y. Onuki, Y. Isikakwa, T. Takabatake, and T. Nanba

J. Phys. Soc. Jpn. 76, 023703 (2007) [5 pages]. (Editors' Choice)

1. Evidence for Suppressed Screening on the Surface of High Temperature La2-xSrxCuO4 and Nd2-xCexCuO4 Superconductors

M. Taguchi, A. Chainani, K. Horiba, Y. Takata, M. Yabashi, K. Tamasaku, Y. Nishino, D. Miwa, T. Ishikawa, T. Takeuchi, K. Yamamoto, M. Matsunami, S. Shin, T. Yokoya, E. Ikenaga, K. Kobayashi, T. Mochiku, K. Hirata, J. Hori, K. Ishii, F. Nakamura and T. Suzuki

Phys. Rev. Lett. 95, 177002 (2005) [4 pages].

1. Temperature-dependent Eu 3d-4f x-ray absorption and resonant photoemission study of the valence transition in EuNi2(Si0.20Ge0.80)2

K. Yamamoto, K. Horiba, M. Taguchi, M. Matsunami, N. Kamakura, A. Chainani, Y. Takata, K. Mimura, M. Shiga, H. Wada, Y. Senba, H. Ohashi, and S. Shin

Phys. Rev. B 72, 161101(R) (2005) [4 pages].

1. Metal-insulator transition in PrRu4P12 and SmRu4P12 investigated by optical spectroscopy

M. Matsunami, L. Chen, M. Takimoto, H. Okamura, T. Nanba, C. Sekine and I. Shirotani

Phys. Rev. B 72, 73105 (2005) [4 pages]. (arXiv:0501487)

1. Far-infrared spectroscopy on electronic states of CuIr2Se4 under high pressure

L. Chen, M. Matsunami, T. Nanba, T. Matsumoto, S. Nagata, Y. Ikemoto, T. Moriwaki, T. Hirono and H. Kimura

J. Phys. Soc. Jpn. 74, 1099 (2005) [4 pages]. (Editors' Choice)

1. Gap formation in the filled skutterudite CeOs4Sb12

M. Matsunami, H. Okamura, T. Nanba, H. Sugawara and H. Sato

J. Phys. Soc. Jpn. 72, 2722 (2003) [4 pages].

1. Charge dynamics in the colossal magnetoresistance pyrochlore Tl2Mn2O7

H. Okamura, T. Koretsune, M. Matsunami, S. Kimura, T. Nanba, H. Imai, Y. Shimakawa, Y. Kubo

Phys. Rev. B 64, 180409(R) (2001) [4 pages].

1. Optical conductivity of Yb1-xLuxB12: Energy gap and mid-infrared peak in diluted Kondo semiconductors

H. Okamura, M. Matsunami, T. Inaoka, S. Kimura, T. Nanba, F. Iga, S. Hiura, J. Klijn and T. Takabatake

Phys. Rev. B 62, 13265(R) (2000) [5 pages].

Proceedings

1. Valence fluctuation in Yb3Si5 probed by synchrotron x-ray photoemission spectroscopy

K. Kuga, M. Matsunami, H. Fujiwara, G. Nosue, A. Ose, A. Sekiyama, A. Yasui, S. Hamamoto, M. Oura, and T. Takeuchi

Proceedings of The 6th Asia-Pacific Conference on Semiconducting Silicides and Related Materials, 2022 (APAC-Silicide 2022)

Jpn. J. Appl. Phys. 62, SD1014 (2023) [4 pages].

1. High-Performance Solid-State Thermal Diode Consisting of Ag2(S,Se,Te)

K. Hirata, T. Matsunaga, S. Singh, M. Matsunami, and T. Takeuchi

Proceedings of International Conference on Thermoelectrics (ICT 2019)

J. Elec. Mater. 49, 2895-2901 (2020) [7 pages].

1. Long-term stability of the colossal Seebeck effect in metallic Cu2Se

D. Byeon, R. Sobota, S. Singh, S. Ghodke, S. Choi, N. Kubo, M. Adachi, Y. Yamamoto, M. Matsunami, and T. Takeuchi

Proceedings of International Conference on Thermoelectrics (ICT 2019)

J. Elec. Mater. 49, 2855-2861 (2020) [7 pages].

1. Investigation of Thermoelectric Properties of Ag2SxSe1-x (x = 0.0, 0.2 and 0.4)

S. Singh, K. Hirata, D. Byeon, T. Matsunaga, O. Muthusamy, S. Ghodke, M. Adachi, Y. Yamamoto, M. Matsunami, and T. Takeuchi

Proceedings of International Conference on Thermoelectrics (ICT 2019)

J. Elec. Mater. 49, 2846-2854 (2020) [9 pages].

1. Enhancement of the Thermoelectric Performance of Si-Ge Nanocomposites Containing a Small Amount of Au and Optimization of Boron Doping

O. Muthusamy, S. Ghodke, S. Singh, K. Delime-Codrin, S. Nishino, M. Adachi, Y. Yamamoto, M. Matsunami, S. Harish, M. Shimomura, and T. Takeuchi

Proceedings of International Conference on Thermoelectrics (ICT 2019)

J. Elec. Mater. 49, 2813-2824 (2020) [12 pages].

1. Superconducting gap of heavily underdoped copper oxide superconductor (Bi,Pb)2Sr2(Ca,Y)Cu2O8+δ

H. Sakamoto, T. Kondo, S. Shin, M. Matsunami, H. Ikuta, and T. Takeuchi

Proceedings of the “39th International Conference on Vacuum Ultraviolet and X-ray Physics (VUVX-2016)

J. Electron Spectrosc. Rel. Phenom. 220, 54 (2017) [4 pages].

1. Electronic structure of Ni2P(0001) studied by resonant photoelectron spectroscopy

S. Ishida, Y. Sugizaki, T. Nakamura, K. Edamoto, M. Matsunami, T. Hajiri, and S. Kimura

Proceedings of the 7th International Symposium on Surface Science (ISSS-7).

e-J. Surf. Sci. Nanotech. 13, 93 (2015) [6 pages].

1. Origin of the black-golden transition in Sm1-xYxS

K. Imura, M. Saito, M. Kaneko, T. Ito, T. Hajiri, M. Matsunami, S. Kimura, K. Deguchi, H. S. Suzuk, and N. K. Sato

Proceedings of the International Conference on Strongly Correlated Electron Systems SCES'14 (Grenoble, France, July 2014).

J. Phys. Conf. Ser. 592, 012028 (2015) [6 pages].

1. Electron Dynamics Probed by Time-Resolved Hard X-ray Photoelectron Spectroscopy

M. Oura, L.-P. Oloff, A. Chainani, K. Rossnagel, M. Matsunami, R. Eguchi, T. Kiss, T. Yamaguchi, Y. Nakatani, J. Miyawaki, K. Yamagami, M. Taguchi, T. Togashi, T. Katayama, K. Ogawa, M. Yabashi, T. Gejo, K. Myojin, K. Tamasaku, Y. Tanaka, T. Ebihara and T. Ishikawak

Proceedings of the 15th IUMRS-ICA (International Union of Materials Research Societies, International Conference in Asia) (Fukuoka, Japan, August 2014).

Trans. Mat. Res. Soc. Jpn. 39, 469 (2014) [5 pages].

1. Angle-Resolved Photoemission Study on Insulator-to-Metal Transition of Sm1-xYxS

M. Kaneko, M. Saito, T. Ito, K. Imura, T. Hajiri, M. Matsunami, S. Kimura, H. S. Suzuki, and N. K. Sato

Proceedings of the International Conference on Strongly Correlated Electron Systems SCES 2013 (Tokyo, Japan, August 2013).

JPS Conf. Proc. 3, 011080 (2014) [6 pages].

1. Polarization-Dependent Three-Dimensional Angle-Resolved Photoemission Spectroscopy of BaFe1.8Co0.2As2

T. Hajiri, T. Ito, M. Matsunami, B. H. Min, Y. S. Kwon, and S. Kimura

Proceedings of the International Conference on Strongly Correlated Electron Systems SCES 2013 (Tokyo, Japan, August 2013).

JPS Conf. Proc. 3, 015028 (2014) [6 pages].

1. Angle resolved photoemission spectroscopy on mixed-valence Sm1-xYxS

K. Imura, T. Hajiri, M. Matsunami, S. Kimura, M. Kaneko, T. Ito, Y. Nishi, N. K. Sato, and H. S. Suzuki

Proceedings of the International Conference on Magnetism ICM'12 (Busan, Korea, July 2012).

J. Kor. Phys. Soc. 62, 2028 (2013) [5 pages].

1. Fabrication of single crystalline EuO thin films with SrO buffer layer on SrTiO3 substrate

H. Miyazaki, H. Momiyama, T. Hajiri, T. Ito, K. Imura, M. Matsunami, and S. Kimura

Proceedings of the International Conference on Strongly Correlated Electron Systems SCES'11 (Cambridge, UK, August-September 2011).

J. Phys: Conf. Series. 391, 012047 (2012) [4 pages].

1. Polarization-dependent three-dimensional angle-resolved photoemission study on LiFeAs

T. Hajiri, R. Niwa, T. Ito, M. Matsunami, Y. J. Song, S. Kimura, and Y. S. Kwon

Proceedings of the International Conference on Strongly Correlated Electron Systems SCES'11 (Cambridge, UK, August-September 2011).

J. Phys: Conf. Series. 391, 012125 (2012) [4 pages].

1. Suppression of Metal-Insulator Transition in PrRu4P12 under High Pressure Studied by Infrared Spectroscopy

H. Okamura, I. Matsutori, A. Takigawa, K. Shoji, K. Miyata, M. Matsunami, H. Sugawara, H. Sato, C. Sekine, I. Shirotani, T. Moriwaki, Y. Ikemoto, and T. Nanba

Proceedings of the International Conference on Heavy Electrons (Tokyo, 2010).

J. Phys. Soc. Jpn. 80, SA092 (2011) [3 pages].

1. Infrared studies of f electron systems under high pressure using synchrotron radiation

H. Okamura, M. Matsunami, R. Kitamura, S. Ishida, A. Ochiai, and T. Nanba

Proceedings of the International Conference on High Pressure Science and Technology, Joint AIRAPT-22 & HPCJ-50 (Tokyo, July 2009).

J. Phys. Conf. Ser. 215, 012051 (2010) [6 pages].

1. High pressure infrared studies of correlated electron materials at SPring-8

H. Okamura, R. Kitamura, M. Matsunami, T. Nanba, H. Sugawara, and H. Sato

Proceedings of the International Workshop on Infrared Microscopy and Spectroscopy with Accelerator Based Sources (Banff, Alberta, Canada, September 2009).

AIP Conf. Proc. 1214, 75 (2010) [3 pages].

1. Optical Conductivity and Electronic Structures in Ce-Filled Skutterudites

M. Matsunami, H. Okamura, K. Senoo, S. Nagano, C. Sekine, I. Shirotani, H. Sugawara, H. Sato, and T. Nanba

Proceedings of the International Conference in New Quantum Phenomena in Skutterudite and Related Systems (Kobe, September 2007).

J. Phys. Soc. Jpn. 77, SA315 (2008) [3 pages].

1. Pressure Effect on Pr-based Skutterudite Compounds

A. Irizawa, K. Shimai, K. Sato, M. Kobayashi, T. Murakami, H. Okamura, T. Nanba, M. Matsunami, C. Sekine, and I. Shirotani

Proceedings of the International Conference on New Quantum Phenomena in Skutterudite and Related Systems (Kobe, September 2007).

J. Phys. Soc. Jpn. 77, SA214 (2008) [2 pages].

1. Universal scaling in the optical conductivity of heavy fermion compounds

H. Okamura, T. Watanabe, M. Matsunami, N. Tsujii, T. Ebihara, H. Sugawara, H. Sato, Y. Onuki, Y. Isikakwa, M. S. Kim, T. Takabatake, and T. Nanba

Proceedings of the International Conference on Strongly Correlated Electron Systems (Houston, May 2007).

Physica B 403, 761 (2008) [3 pages].

1. Electronic state of PrFe4P12 under high pressure probed by infrared spectroscopy

A. Irizawa, K. Sato, M. Kobayashi, K. Shimai, T. Murakami, H. Okamura, T. Nanba, M. Matsunami, H. Sugawara, and H. Sato

Proceedings of the International Conference on Strongly Correlated Electron Systems (Houston, May 2007).

Physica B 403, 948 (2008) [2 pages].

1. Pressure-tuning of the c-f hybridization in Yb metal detected by infrared spectroscopy up to 18 GPa

H. Okamura, K. Senoo, M. Matsunami, and T. Nanba

Proceedings of the International Conference on Novel Pressure-induced Phenomena in Condensed Matter Systems

J. Phys. Soc. Jpn. 76, SA9 (2007) [2 pages].

1. Study on Cross-Over Change from Metal to Insulator in the Electronic States of Copper-Spinel Compounds under High Pressure

A. Irizawa, M. Kobayashi, K. Satoh, T. Nanba, L. Chen, T. Matsumoto, M. Matsunami, M. Ito, T. Suzuki, and S. Nagata

Proceedings of the International Conference on Novel Pressure-induced Phenomena in Condensed Matter Systems

J. Phys. Soc. Jpn. 76, SA13 (2007) [2 pages].

1. Electronic structure of 3d1 configuration vanadium oxides studied by soft X-ray and hard X-ray photoemission spectroscopy

R. Eguchi, M. Taguchi, M. Matsunami, K. Horiba, K. Yamamoto, A. Chainani, Y. Takata, M. Yabashi, D. Miwa, Y. Nishino, K. Tamasaku, T. Ishikawa, Y. Senba, H. Ohashi, I.H. Inoue, Y. Muraoka, Z. Hiroi, and S. Shin

Proceedings of the International Conference on Electronic Spectroscopy and Structure (ICESS10) (Foz do Iguace, Brazil, August-September, 2006).

J. Electron Spectrosc. Relat. Phenom., 156-158, 421 (2007) [5 pages].

1. Hard X-ray and soft X-ray photoemission study of vanadium oxides

R. Eguchi, Y. Takata, M. Matsunami, K. Horiba, K. Yamamoto, M. Taguchi, A. Chainani, M. Yabashi, D. Miwa, Y. Nishino, K. Tamasaku, T. Ishikawa, Y. Senba, H. Ohashi, I.H. Inoue, and S. Shin

Proceedings of the International Conference on Magnetism (Kyoto, July-August 2006).

J. Magn. Magn. Mater. 310, e289 (2007) [3 pages].

1. Study on Electronic States of Solids Under High Pressure by Infrared Synchrotron Radiation

T. Nanba, A. Irizawa, L. Chen, and M. Matsunami

Proceedings of 2nd International Symposium on Portable Synchrotron Light Sources and Advanced Applications (Kusatsu, Japan, Jan 2007).

AIP Conf. Proc. 902, 71 (2007) [2 pages].

1. Optical study on metal-insulator change in PrFe4P12 under high pressure

A. Irizawa, K. Sato, M. Kobayashi, T. Nanba, M. Matsunami, H. Sugawara, and H. Sato

Proceedings of the International Conference on Magnetism (Kyoto, July-August 2006).

J. Magn. Magn. Mater. 310, E221 (2007) [2 pages].

1. High Resolution Hard X-ray Photoemission Spectroscopy at SPring-8: Basic Performance and Characterization

Y. Takata, K. Horiba, M. Matsunami, S. Shin, M. Yabashi, K. Tamasaku, Y. Nishino, D. Miwa, T. Isikawa, E. Ikenaga, K. Kobayashi, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, H. Nohira, T. Hattori, S. Sodergren, and B. Wannberg

Proceedings of the Ninth International Conference on Synchtoron Radiation Instrumentations (Daegu, Korea, June 2006).

AIP Conf. Proc. 879, 1597 (2007) [7 pages].

1. A High-Resolution Soft X-Ray Photoemission Apparatus Combined with a Laser Molecular-Beam Epitaxy System at SPring-8 BL17SU

K. Horiba, R. Eguchi, N. Kamakura, K. Yamamoto, M. Matsunami, Y. Takata, Y. Senba, H. Ohashi, and S. Shin

Proceedings of the Ninth International Conference on Synchtoron Radiation Instrumentations (Daegu, Korea, June 2006).

AIP Conf. Proc. 879, 1611 (2007) [4 pages].

1. Photoemission spectroscopy of Ce-filled skutterudites

M. Matsunami, K. Horiba, M. Taguchi, K. Yamamoto, A. Chainani, Y. Takata, Y. Senba, H. Ohashi, H. Sugawara, H. Sato, H. Harima, and S. Shin

Proceedings of the International Conference on Strongly Correlated Electron Systems SCES'05 (Vienna, Austria, July 2005).

Physica B 378-380, 177 (2006) [2 pages].

1. Temperature dependent X-ray absorption spectroscopy of the valence transition in EuNi2(Si0.20Ge0.80)2

K. Yamamoto, K. Horiba, M. Taguchi, M. Matsunami, Y. Takata, A. Chainani, K. Mimura, Y. Senba, H. Ohashi, M. Shiga, H. Wada, and S. Shin

Proceedings of the International Conference on Strongly Correlated Electron Systems SCES'05 (Vienna, Austria, July 2005).

Physica B 378-380, 681 (2006) [2 pages].

1. Optical response of FeS due to metal-insulator transition at pressure

L. Chen, M. Matsunami, T. Nanba, and H. Kobayashi

Proceedings of the International Conference on Strongly Correlated Electron Systems SCES'05 (Vienna, Austria, July 2005).

Physica B 378-380, 1116 (2006) [2 pages].

1. Optical response of a filled skutterudite compound GdRu4P12 due to magnetic ordering

M. Matsunami, M. Takimoto, H. Okamura, T. Nanba, C. Sekine and I. Shirotani

Proceedings of the International Conference on Strongly Correlated Electron Systems SCES'04 (Karlsruhe, Germany, July 2004).

Physica B 359-361, 844 (2005) [3 pages].

1. Infrared spectroscopy on the electronic state of transition metal compounds under high pressure

L. Chen, M. Matsunami, and T. Nanba

Proceedings of the International Conference on Strongly Correlated Electron Systems SCES'04 (Karlsruhe, Germany, July 2004).

Physica B 359-361, 1186 (2005) [3 pages].

1. New Infrared and Terahertz Beamline BL6B at UVSOR

S. Kimura, E. Nakamura, J. Yamazaki, M. Katoh, T. Nishi, H. Okamura, M. Matsunami, L. Chen, and T. Nanba

Proceedings of the International Conference on Synchtoron Radiation Instrumentations (San Francisco, August 2003).

AIP Conf. Proc. 705, 416 (2004) [4 pages].

1. Infrared Microspectroscopy Station at BL43IR of SPring-8

Y. Ikemoto, T. Moriwaki, T. Hirono, S. Kimura, K. Shinoda, M. Matsunami, N. Nagai, T. Nanba, K. Kobayashi, and H. Kimura

Proceedings of the International Workshop on Infrared Microscopy and Spectroscopy with Accelerator Based Sources (Lake Tahoe, CA, August 2003).

Infrared Phys. Tech. 45, 369 (2004) [5 pages].

1. Optical study of c-f hybridization states in mixed-valent Yb compounds: Metallic YbAl3 vs Semiconducting YbB12

H. Okamura, T. Michizawa, M. Matsunami, T. Nanba, S. Kimura, T. Ebihara, F. Iga, and T. Takabatake

Proceedings of the International Conference on Magnetism (Roma, July-August 2003).

J. Magn. Magn. Mater. 272-276, E51 (2004) [2 pages].

1. Optical properties of filled skutterudites CeT4Sb12 (T=Fe, Ru, Os)

M. Matsunami, H. Okamura, T. Nanba, H. Sugawara, and H. Sato

Proceedings of the International Conference on Magnetism (Roma, July-August 2003).

J. Magn. Magn. Mater. 272-276, E41 (2004) [2 pages].

1. Infrared study on the metal-insulator transition in filled skutterudites RRu4P12 (R=Pr, Sm)

M. Matsunami, L. Chen, H. Okamura, T. Nanba, C. Sekine, and I. Shirotani

Proceedings of the International Conference on Magnetism (Roma, July-August 2003).

J. Magn. Magn. Mater. 272-276, E39 (2004) [2 pages].

1. Direct observation of the pressure-induced semiconductor-to-metal transition in Yb monochalcogenides

M. Matsunami, L. Chen, T. Nanba, and A. Ochiai

Proceedings of the International Conference on Strongly Correlated Electron Systems (Krakow, July 2002).

Acta Physica Polonica B 34, 1011 (2003) [4 pages].

1. Optical response of Cu1-xZnxIr2S4 due to metal-insulator transition

L. Chen, M. Matsunami, T. Nanba, G. Cao, H. Suzuki, M. Isobe, and T. Matsumoto

Proceedings of the International Conference on Strongly Correlated Electron Systems (Krakow, July 2002).

Acta Physica Polonica B 34, 617 (2003) [4 pages].

1. Optical Conductivity of CeNiSn, CeRhSb, and CeRhAs

M. Matsunami, H. Okamura, T. Nanba, T. Suemitsu, T. Yoshino, T. Takabatake, Y.Isikawa, and H. Harima

Proceedings of the International Conference on Strongly Correlated Electrons with Orbital Degrees of Freedom (Sendai, September 2001).

J. Phys. Soc. Jpn. 71, S291 (2002) [3 pages].

1. Electronic Structure of the Kondo Smiconductor YbB12: Temperature and Non-Magnetic Dilution Effects

H. Okamura, M. Matsunami, T. Inaoka, S. Kimura, T. Nanba, F. Iga, S. Hiura, and T. Takabatake

Proceedings of the International Conference on Strongly Correlated Electrons with Orbital Degrees of Freedom (Sendai, September 2001).

J. Phys. Soc. Jpn. 71, S303 (2002) [3 pages].

1. Optical gap in the diluted Kondo semiconductors Yb1-xLuxB12: lattice and single-site effects

H. Okamura, M. Matsunami, S. Kimura, T. Nanba, F. Iga, and T. Takabatake

Proceedings of the International Conference on Strongly Correlated Electron Systems (Ann Arbor, August 2001).

Physica B 312-313, 157 (2002) [2 pages].

1. Pseudogap formation in the optical conductivity of CeNiSn, CeRhSb, and CeRhAs

H. Okamura, M. Matsunami, T. Nanba, T. Suemitsu, T. Yoshino, T. Takabatake, Y. Isikawa, and H. Harima

Proceedings of the International Conference on Strongly Correlated Electron Systems (Ann Arbor, August 2001).

Physica B 312-313, 218 (2002) [3 pages].

1. Magneto-optical study of the colossal magnetoresistance pyrochlore Tl2Mn2O7

H. Okamura, T. Koretsune, M. Matsunami, S. Kimura, T. Nanba, H. Imai, Y. Shimakawa, and Y. Kubo

Proceedings of the International Conference on Strongly Correlated Electron Systems (Ann Arbor, August 2001).

Physica B 312-313, 714 (2002) [2 pages].

1. Infrared beamline at SPring-8: design and commissioning

H. Kimura, T. Moriwaki, N. Takahashi H. Aoyagi, T. Matsushita, Y. Ishizawa, M. Masaki, S. Ohishi, H. Okuma, T. Nanba, M. Sakurai, S. Kimura, H. Okamura, N. Nakagawa, T. Takahashi, K. Fukui, K. Shinoda, Y. Kondo, T. Sata, M. Okuno, M. Matsunami, R. Koyanagi, and Y. Yoshimatsu

Proceedings of the International Conference on Synchtoron Radiation Instrumentations (Berlin, Germany, August 2000).

Nucl. Instr. Methods Phys. Res. A 467-468, 441 (2001) [4 pages].

1. Infrared spectromicroscopy and magneto-optical imaging stations at SPring-8

S. Kimura, T. Nanba, T. Sada, M. Okuno, M. Matsunami, K. Shinoda, H. Kimura, T. Moriwaki, M. Yamagata, Y. Kondo, Y. Yoshimatsu, T. Takahashi, K. Fukui, T. Kawamoto, and T. Ishikawa

Proceedings of the International Conference on Synchtoron Radiation Instrumentations (Berlin, Germany, August 2000).

Nucl. Instr. Methods Phys. Res. A 467-468, 893 (2001) [4 pages].