Spin-Polarized Angle-Resolved Photoelectron Spectroscopy of the So-Predicted Kondo Topological Insulator SmB6 S. Suga, K. Sakamoto, T. Okuda, K. Miyamoto, K. Kuroda, A. Sekiyama, J. Yamaguchi, H. Fujiwara, A. Irizawa, T. Ito, S. Kimura, T. Balashov, W. Wulfhekel, S. Yeo, F. Iga, S. Imada, J. Phys. Soc. Jpn. 83, 014705/1-6 (2013/12) DOI:10.7566/JPSJ.83.014705.
Ce electronic states in Nd0.45-xCexSr0.55MnO3 probed by x-ray absorption spectroscopy and photoemission T. Shirai, S. Imada, A. Higashiya, A. Sekiyama, S. Suga, T. Muro, Y. Tanaka, K. Tamasaku, M. Yabashi, T. Ishikawa, S. Miyasaka and Y. Tokura, J. Phys.: Condens. Matter 25, 415601/1-6, (2013/09) DOI:10.1088/0953-8984/25/41/415601. [PDF]
Intrinsic correlated electronic structure of CrO2 revealed by hard x-ray photoemission spectroscopy M. Sperlich, C. König, G. Güntherodt, A. Sekiyama, G. Funabashi, M. Tsunekawa, S. Imada, A. Shigemoto, K. Okada, A. Higashiya, M. Yabashi, K. Tamasaku, T. Ishikawa, V. Renken, T. Allmers, M. Donath, and S. Suga, Phys. Rev. B 87, 235138/1-5, (2013/06) DOI:10.1103/PhysRevB.87.235138.
Recoil effects for valence and core photoelectrons in V3Si S. Suga, S. Itoda, A. Sekiyama, H. Fujiwara, S. Komori, S. Imada, M. Yabashi, K. Tamasaku, A. Higashiya, T. Ishikawa, M. Shang, T. Fujikawa, Phys. Rev. B 86, 035146/1-6, (2012/07) DOI:10.1103/PhysRevB.86.035146.
An XMCD-PEEM study on magnetized Dy-doped Nd-Fe-B permanent magnets R. Yamaguchi, K. Terashima, K. Fukumoto, Y. Takada, M. Kotsugi, Y. Miyata, K. Mima, S. Komori, S. Itoda, Y. Nakatsu, M. Yano, N. Miyamoto, T. Nakamura, T. Kinoshita, Y. Watanabe, A. Manabe, S. Suga, S. Imada, IBM J. Res. Dev. 55/4, 12/1-6 (2011/08) DOI:10.1147/JRD.2011.2159148. [PDF]
Evidence for the constancy of U in the Mott transition of V2O3 H. Fujiwara, A. Sekiyama, S.-K. Mo, J. W. Allen, J. Yamaguchi, G. Funabashi, S. Imada, P. Metcalf, A. Higashiya, M. Yabashi, K. Tamasaku, T. Ishikawa, S. Suga, Phys. Rev. B 84, 075117/1-5 (2011/08) DOI:10.1103/PhysRevB.84.075117.
Hard x-ray photoelectron spectroscopy of the metal-insulator transition in LiRh2O4 Y. Nakatsu, A. Sekiyama, S. Imada, Y. Okamoto, S. Niitaka, H. Takagi, A. Higashiya, M. Yabashi, K. Tamasaku, T. Ishikawa, S. Suga, Phys. Rev. B 83, 115120/1-5 (2011/03) DOI: 10.1103/PhysRevB.83.115120.
Electronic correlation in FeSe superconductor studied by bulk-sensitive photoemission spectroscopy A. Yamasaki, Y. Matsui, S. Imada, K. Takase, H. Azuma, T. Muro, Y. Kato, A. Higashiya, A. Sekiyama, S. Suga, M. Yabashi, K. Tamasaku, T. Ishikawa, K. Terashima, H. Kobori, A. Sugimura, N. Umeyama, H. Sato, Y. Hara, N. Miyakawa, S. I. Ikeda, Phys. Rev. B 82, 184511/1-7 (2010/11).
Polaronic Behavior of Photoelectron Spectra of Fe3O4 Revealed by Both Hard X-ray and Extremely Low Energy Photons M. Kimura, H. Fujiwara, A. Sekiyama, J. Yamaguchi, K. Kishimoto, H. Sugiyama, G. Funabashi, S. Imada, S. Iguchi, Y. Tokura, A. Higashiya, M. Yabashi, K. Tamasaku, T. Ishikawa, T. Ito, S.-i. Kimura, S. Suga, J. Phys. Soc. Jpn. 79, 064710/1-5 (2010/05).
The prominent 5d-orbital contribution to the conduction electrons in gold A. Sekiyama, J. Yamaguchi, A. Higashiya, M. Obara, H. Sugiyama, M. Y. Kimura, S. Suga, S. Imada, I. A. Nekrasov, M. Yabashi, K. Tamasaku and T. Ishikawa, New J. Phys. 12, 043045 (2010/04).
V-V dimerization effects on bulk-sensitive hard x-ray photoemission spectra for Magneacuteli phase vanadium oxides M. Obara, A. Sekiyama, S. Imada, J. Yamaguchi, T. Miyamachi, T. Balashov, W. Wulfhekel, M. Yabashi, K. Tamasaku, A. Higashiya, T. Ishikawa, K. Fujiwara, H. Takagi, and S. Suga, Phys. Rev. B 81, 113107/1-4 (2010/03).
Do all nuclei recoil on photoemission in compounds? S. Suga, A. Sekiyama, H. Fujiwara, Y. Nakatsu, T. Miyamachi, S. Imada, P. Baltzer, S. Niitaka, H. Takagi, K. Yoshimura, M. Yabashi, K. Tamasaku, A. Higashiya, T. Ishikawa, New J. Phys 11, 073025/1-9 (2009).
Study of electronic states of a pyrochlore-type molybdate (Sm2Mo2O7) at low temperature by means of hard x-ray photoemission spectroscopy A. Higashiya, S. Imada, H. Fujiwara, A. Sekiyama, S. Suga, A. Yamasaki, Y. Taguchi, M. Iwama, K. Ohgushi, Y. Tokura and T. Ishikawa, J.Phys.: Conf. Ser 150, 042055/ 1-4 (2009).
~8 keV photoemission of the metal–insulator transition system VO2 S Suga, A Sekiyama, S Imada, T Miyamachi, H Fujiwara, A Yamasaki, K Yoshimura, K Okada, M Yabashi, K Tamasaku, A Higashiya and T Ishikawa, New. J. Phys. 11/, 103015/1-12 (2009/10).
Novel behaviors in rare-earth-filled skutterudites studied by bulk-sensitive photoemission spectroscopy A. Yamasaki, S. Imada, A. Sekiyama, H. Fujiwara, M. Yano, J. Yamaguchi, T. Miyamachi, H. Sugawara, D. Kikuchi, H. Sato, T. Muro, A. Higashiya, M. Yabashi, K. Tamasaku, T. Ishikawa, H. Harima, S. Suga, Int. J. Mater. Res. 100/ 9, 1249-1251 (2009/09).
Unraveling Genuine First Order Bulk Valence Transition and Kondo Resonance Behaviors in YbInCu4 by High Energy Photoelectron Spectroscopy S. Suga, A. Sekiyama, S. Imada, J. Yamaguchi, A. Shigemoto, A. Irizawa, K. Yoshimura, M. Yabashi, K. Tamasaku, A. Higashiya, T. Ishikawa, J. Phys. Soc. Jpn. 78, 074704/1-5 (2009/06).
Kondo lattice effects and the collapse of lattice coherence in Yb1－xLuxB12 studied by hard x-ray photoelectron spectroscopy J. Yamaguchi, A. Sekiyama, S. Imada, H. Fujiwara, M. Yano, T. Miyamachi, G. Funabashi, M. Obara, A. Higashiya, K. Tamasaku, M. Yabashi, T. Ishikawa, F. Iga, T. Takabatake, S. Suga, Phys. Rev. B 79, 125121/1-8 (2009/03).
Electronic structures and p-d exchange interaction of Mn-doped diluted magnetic semiconductors S. Ueda, A. Sekiyama, T. Iwasaki, S. Imada, S. Suga, Y. Saitoh, W. Giriat, and S. Takeyama, Phys. Rev. B 78, 205206/1-8 (2008/11).
Bulk electronic structures and strong electron–phonon interactions in an electron-doped high-temperature superconductor M. Tsunekawa, A. Sekiyama, S. Kasai, S. Imada, H. Fujiwara, T. Muro, Y. Onose, Y. Tokura, S. Suga, New J. Phys. 10, 073005/1-11 (2008/07).
Significance of the inter-site Coulomb interaction between the O 2p and Cu 3d holes revealed by resonant inelastic x-ray scattering of Sr14Cu24O41 A. Higashiya, S. Imada, T. Murakawa, H. Fujiwara, S. Kasai, A. Sekiyama, S. Suga, K. Okada, M. Yabashi, K. Tamasaku, T. Ishikawa, H. Eisaki, New J. Phys. 10, 053033/1-10 (2008/05).
Stability of electronic states across the metal-insulator transition in PrRu4P12 A. Yamasaki, S. Imada, A. Sekiyama, H. Fujiwara, M. Yano, J. Yamaguchi, G. Funahashi, H. Sugawara, D. Kikuchi, H. Sato, T. Muro, A. Higashiya, K. Tamasaku, M. Yabashi, H. Kobori, A. Sugimura, T. Ishikawa, H. Harima, S. Suga, Phys. Rev. B 77, 165125/1-4 (2008/04).
Electronic and magnetic states of Mn2.97Co0.03GaC studied by soft X-ray photoemission and magnetic circular dichroism A. Matsumoto, M. Tsunekawa, S. Suga, H. Wada, T. Muro, T. Nakamura, S. Imada, Jpn. J. Appl. Phys. 47/3, 1567-1569 (2008/03).
Electronic structure of CeRu2X2 (X=Si,Ge) in the paramagnetic phase studied by soft x-ray ARPES and hard x-ray photoelectron spectroscopy M. Yano, A. Sekiyama, H. Fujiwara, Y. Amano, S. Imada, T. Muro, M. Yabashi, K. Tamasaku, A. Higashiya, T. Ishikawa, Y. Onuki, and S. Suga, Phyr. Rev. B 77, 035118/1-8 (2008/01).
Soft x-ray spectroscopy of the possibly heavy-fermion compound NdOs4Sb12 S. Imada, H. Higashimichi, A. Yamasaki, M. Yano, T. Muro, A. Sekiyama, S. Suga, H. Sugawara, D. Kikuchi, H. Sato, Phys. Rev. B 76, 153106/1-4 (2007/10). [PDF]
Reduction of Kondo lattice effects in Yb1-xLuxAl3 observed by soft x-ray photoelectron spectroscopy J. Yamaguchi, A. Sekiyama, S. Imada, A. Yamasaki, M. Tsunekawa, T. Muro, T. Ebihara, Y. Onuki, S. Suga, New J. Phys. 9/ 9, 317/1-10 (2007/09).
Electron correlation and magnetic properties of c(2×2)CuMn/Cu(001) two-dimensional surface alloys A. Kimura, S. Asanao, T. Kambe, T. Xie, S. Watanabe, M. Taniguchi, S. Qiao, E. Hashimoto, H. Namatame, T. Muro, S. Imada, S. Suga, Phys. Rev. B 76, 115416/1-5 (2007/09).
Electron correlation and the metal-insulator transition of the pyrochlore molybdates R2Mo2O7 (R=Nd, Sm, Gd, Tb, Y) A. Higashiya, S. Imada, A. Yamasaki, A. Irizawa, A. Sekiyama, S. Suga, Y. Taguchi, M. Iwama, K. Ohgushi, Y. Tokura, Phys. Rev. B 75, 155106/1-7 (2007/04).
Coexistence of strongly mixed valence and heavy-Fermion character in SmOs4Sb12 studied by soft and hard x-ray spectroscopy A. Yamasaki, S. Imada, H. Higashimichi, H. Fujiwara, T. Saita, T. Miyamachi, A. Sekiyama, H. Sugawara, D. Kikuchi, H. Sato, A. Higashiya, M. Yabashi, K. Tamasaku, D. Miwa, T. Ishikawa, S. Suga, Phys. Rev. Lett. 98, 156402/1-4 (2007/04).
Soft x-ray spectroscopy and microspectroscopy of correlated materials: photoemission and magnetic circular dichroism S. Imada, A. Sekiyama, S. Suga, J. Phys.: Condens. Matter, 19, 125204/1-26 (2007/03).
Magnetism of L10 ordered FePt in the thinnest limit S. Imada, A. Yamasaki, S. Suga, T. Shima, K. Takanashi, Appl. Phys. Lett. 90, 132507/1-3 (2007/02). [PDF]
Three-Dimensional Bulk Fermiology of CeRu2Ge2 in the Paramagnetic Phase by Soft X-Ray hn-Dependent (700-860 eV) ARPES M. Yano, A. Sekiyama, H. Fujiwara, T. Saita, S. Imada, T. Muro, Y. Onuki, S. Suga, Phys. Rev. Lett. 98, 036405/1-4 (2007/01).
Ultraviolet photoemission of Ni2MnZ (Z = Ga, In, and Sn) S. Imada, A. Yamasaki, A. Kusuda, A. Higashiya, A. Irizawa, A. Sekiyama, T. Kanomata, S. Suga, J. Electron Spctrosc. Relat. Phenom. 156-158, 433-435 (2007/01).
Electronic and magnetic states of Ce 4f electrons in CeRh3B2 S. Imada, A. Yamasaki, M. Tsunekawa, A. Higashiya, A. Sekiyama, H. Sugawara, H. Sato, S. Suga, J. Electron Spectrosc. Relat. Phenom. 156-158, 436-440 (2007/01).
Bulk valence band of Ce(Pd1-xCux)3 studied by 3d -> 4f resonant photoemission S. Kasai, S. Imada, A. Yamasaki, A. Sekiyama, F. Iga, A. Kasaya, S. Suga, J. Electron Spectrosc. Relat. Phenom. 156-158, 441-444 (2007/01).
Composition dependence of Ni magnetic moment in Ni-Mn based Heusler-type intermetallic compounds S. Imada, A. Yamasaki, T. Kanomata, T. Muro, A. Sekiyama, S. Suga, J. Magn. Magn. Mater. 310, 1857-1858 (2006/11).
Photoemission spectroscopy and X-ray absorption spectroscopy studies of the superconducting pyrochlore oxide Cd2Re2O7 A. Irizawa, A. Higashiya, S. Kasai, T. Sasabayashi, A. Shigemoto, A. Sekiyama, S. Imada S, S. Suga, H. Sakai, H. Ohno, M. Kato, K. Yoshimura, H. Harima, J. Phys. Soc. Jpn. 75, 094701/1-5 (2006/08).
Kondo lattice effects of YbAl3 suggested by temperature dependence of high-accuracy high-energy photoelectron spectroscopy S. Suga, A. Sekiyama, S. Imada, A. Shigemoto, A. Yamasaki, M. Tsunekawa, C. Dallera, L. Braicovich, T.-L. Lee, O. Sakai, T. Ebihara, Y. Onuki, J. Phys. Soc. Jpn. 74/ 11, 2880-2884 (2005/11).
Photoemission spectroscopy of Sm4As3 using soft and hard x-rays A. Yamasaki, A. Sekiyama, S. Imada, M. Tsunekawa, C. Dallera, L. Braicovich,L. Lee, A. Ochiai, S. Suga, J. Phys. Soc. Jpn. 74, 2538-2543 (2005/09).
Charge dynamics in strongly correlated one-dimensional Cu-O chain systems revealed by inelastic x-ray scattering S. Suga, S. Imada, A. Higashiya, A. Shigemoto, S. Kasai, M. Sing, H.iwara, A. Sekiyama, A. Yamasaki, C. Kim, T. Nomura, J. Igarashi, M. Yabashi, T. Ishikawa, Phys. Rev. B 72, 081101/1-4 (2005/08).
Bulk-sensitive photoemission spectroscopy for heavy-fermion Pr compounds using hard x-ray A. Yamasaki, S. Imada, A. Sekiyama, M. Tsunekawa, C. Dallera, L.icovich,L. Lee, H. Sugawara, H. Sato, R. Settai, Y. Onuki, S. Suga, J. Phys. Soc. Jpn.74/ 7, 2045-2051 (2005/07).
Bulk sensitive photoelectron spectroscopy with soft and hard X-rays: Soft X-ray ARPES toward high resolution HAXPES A. Yamasaki, A. Sekiyama, S. Imada, M. Tsunekawa, A. Higashiya, A. Shigemoto, S. Suga, Nucl Instrum Methods Phys Res A 547/ 1, 136-150 (2005/07)
Magnetism-induced symmetry breaking in photoelectron diffraction patterns A. Chasse, W. Kuch, M. Kotsugi, X. Gao, F. Offi, S. Imada, S. Suga, H. Daimon, J. Kirschner, Phys. Rev. B 71, 014444/1-10 (2005/01).
Mutual experimental and theoretical validation of bulk photoemission spectra of Sr1-xCaxVO3 A. Sekiyama, H. Fujiwara, S. Imada, S. Suga, H. Eisaki, S. I. Ueda, K. Takegahara, H. Harima, Y. Saitoh, I. A. Nekrasov, G. Keller, D. E. Kondakov, A. V. Kozhevnikov, T. Pruschke, K. Held, D. Vollhardt, V. I. Anisimov, Phys. Rev. Lett. 93, 156402/1-4 (2004/10).
High-energy angle-resolved photoemission spectroscopy probing bulk correlated electronic states in quasi-one-dimensional V6O13 and SrCuO2 S. Suga, A. Shigemoto, A. Sekiyama, S. Imada, A. Yamasaki, A. Irizawa, S. Kasai, Y. Saitoh, T. Muro, N. Tomita, K. Nasu, H. Eisaki, Y. Ueda, Phys. Rev. B 70, 155106/1-7 (2004/10).
Direct evidence of ferromagnetism without net magnetization observed by x-ray magnetic circular dichroism S. Qiao, A. Kimura, H. Adachi, K. Iori, K. Miyamoto, T. Xie, H. Namatame, M. Taniguchi, A. Tanaka, T. Muro, S. Imada, S. Suga, Phys. Rev. B 70, 134418/1-5 (2004/10).
Possible Kondo resonance in PrFe4P12 studied by bulk-sensitive photoemission A. Yamasaki, S. Imada, T. Nanba, A.Sekiyama, H. Sugawara, H. Sato, C. Sekine, I. Shirotani, H. Harima, S. Suga, Phys. Rev. B 70, 113103/1-4 (2004/09).
Resonant Inelastic X-Ray Scattering (RIXS) in SrCuO2 A. Higashiya, A. Shigemoto, S. Kasai, S. Imada, S. Suga, M. Sing, C. Kim, M. Yabashi, K. Tamasaku, T. Ishikawa, Solid State Commun. 130/ 1, 7-11 (2004/04).