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Your search keyword '"Ikenaga, Eiji"' showing total 21 results
Start Over Author "Ikenaga, Eiji" Journal physical review b
21 results on '"Ikenaga, Eiji"'

1. Electronic structure and anharmonic phonon mode in BaIr2Ge7 with two-dimensional Ba-Ge networks studied by photoemission spectroscopy

Author

Ishida, Tatsuhiro, primary, Ootsuki, Daiki, additional, Ishida, Shigeyuki, additional, Kitamura, Miho, additional, Horiba, Koji, additional, Takagi, Yasumasa, additional, Yasui, Akira, additional, Ikenaga, Eiji, additional, Kawashima, Kenji, additional, Yanagi, Yousuke, additional, Iyo, Akira, additional, Eisaki, Hiroshi, additional, and Yoshida, Teppei, additional

Published
2023
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2. Observation of metal to nonmagnetic insulator transition in polycrystalline RuP by photoemission spectroscopy

Author

Ootsuki, Daiki, primary, Sawada, Kei, additional, Goto, Hiroki, additional, Hirai, Daigorou, additional, Shibata, Daisuke, additional, Kawamoto, Masato, additional, Yasui, Akira, additional, Ikenaga, Eiji, additional, Arita, Masashi, additional, Namatame, Hirofumi, additional, Taniguchi, Masaki, additional, Toriyama, Tatsuya, additional, Konishi, Takehisa, additional, Ohta, Yukinori, additional, Saini, Naurang L., additional, Yoshida, Teppei, additional, Mizokawa, Takashi, additional, and Takagi, Hidenori, additional

Published
2020
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7. 硬X線光電子分光によるbeta-Ti_3O_5とlambda-Ti_3O_5電子状態並びにその相関の研究

Author

Kobayashi, Keisuke, Taguchi, Munetaka, Kobata, Masaaki, Tanaka, Kenji, Tokoro, Hiroko, Daimon, Hiroshi, Okane, Tetsuo, Yamagami, Hiroshi, Ikenaga, Eiji, and Okoshi, Shinichi

Abstract

We have conducted hard X-ray photoelectron spectroscopy investigations of the electronic structure changes and electron correlation phenomena which take place upon the photoinduced reversible phase transition between $\beta$- and $\lambda$-Ti$_3$O. From valence band spectra of $\beta$- and $\lambda$-Ti$_3$O$_5$, we have identified the bipolaron caused by the $\sigma$-type bonding of $d_{xy}$ orbitals in $\beta$-Ti$_3$O$_5$ and the $\pi$ stacking between the $d_{xy}$ orbitals between different Ti sites in $\lambda$-Ti$_3$O$_5$, previously predicted by \textit{ab initio} calculations. On the other hand, the Ti $2p$ and Ti $1s$ core level spectra exhibit nonlocal screening satellite features, which are typical spectroscopic signs of strong electron correlation in the coherent Ti $t_{2g}$ states. Correlation in the valence band also manifests to reduce the plasmon energy, which results in an enhancement of the valence electron mass by a factor of 2.7.

Published
2017

8. Photoemission and DMFT study of electronic correlations in SrMoO3: Effects of Hund’s rule

Author

Wadati, H., Mravlje, Jernej, Yoshimatsu, Kohei, Kumigashira, Hiroshi, Oshima, M, Okane, Tetsuo, Ikenaga, Eiji, Fujimori, Atsushi, Georges, A., Radetinac, A, Takahashi, Kei, Kawasaki, Masashi, and Tokura, Yoshinori

Subjects
Condensed Matter::Strongly Correlated Electrons
Abstract

We investigate the electronic structure of a perovskite-type Pauli paramagnet SrMoO 3 (t 2g 2 ) thin film using hard x-ray photoemission spectroscopy and compare the results to realistic calculations that combine density functional theory within the local-density approximation (LDA) with dynamical mean-field theory (DMFT). Despite the clear signature of electron correlations in the electronic specific heat, the narrowing of the quasiparticle bands is not observed in the photoemission spectrum. This is explained in terms of the characteristic effect of Hund's rule coupling for partially filled t 2g bands, which induces strong quasiparticle renormalization already for values of Hubbard interaction which are smaller than the bandwidth. This interpretation is supported by DMFT model calculations including Hund's rule coupling, which show a renormalization of low-energy quasiparticles without affecting the overall bandwidth. The photoemission spectra show additional spectral weight around −2.5 eV that is not present in the LDA+DMFT results, pointing to a source of correlations that is not present in our calculations that include only on-site interactions. We interpret this weight as a plasmon satellite, which is supported by the measured core-level spectra that all show satellites at this energy.

Published
2014

9. Probing the electronic states of high-TMR off-stoichiometric Co2MnSi thin films by hard x-ray photoelectron spectroscopy

Author

Kozina, Xeniya, primary, Karel, Julie, additional, Ouardi, Siham, additional, Chadov, Stanislav, additional, Fecher, Gerhard H., additional, Felser, Claudia, additional, Stryganyuk, Gregory, additional, Balke, Benjamin, additional, Ishikawa, Takayuki, additional, Uemura, Tetsuya, additional, Yamamoto, Masafumi, additional, Ikenaga, Eiji, additional, Ueda, Shigenori, additional, and Kobayashi, Keisuke, additional

Published
2014
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11. Electronic, structural, and magnetic properties of the half-metallic ferromagnetic quaternary Heusler compounds CoFeMnZ(Z=Al, Ga, Si, Ge)

Author

Alijani, Vajiheh, primary, Ouardi, Siham, additional, Fecher, Gerhard H., additional, Winterlik, Jürgen, additional, Naghavi, S. Shahab, additional, Kozina, Xeniya, additional, Stryganyuk, Gregory, additional, Felser, Claudia, additional, Ikenaga, Eiji, additional, Yamashita, Yoshiyuki, additional, Ueda, Shigenori, additional, and Kobayashi, Keisuke, additional

Published
2011
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13. Electronic and crystallographic structure, hard x-ray photoemission, and mechanical and transport properties of the half-metallic Heusler compound Co2MnGe

Author

Ouardi, Siham, primary, Fecher, Gerhard H., additional, Balke, Benjamin, additional, Beleanu, Andreea, additional, Kozina, Xeniya, additional, Stryganyuk, Gregory, additional, Felser, Claudia, additional, Klöß, Werner, additional, Schrader, Hartmut, additional, Bernardi, Fabiano, additional, Morais, Jonder, additional, Ikenaga, Eiji, additional, Yamashita, Yoshiyuki, additional, Ueda, Shigenori, additional, and Kobayashi, Keisuke, additional

Published
2011
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14. Magnetic dichroism in angle-resolved hard x-ray photoemission from buried layers

Author

Kozina, Xeniya, primary, Fecher, Gerhard H., additional, Stryganyuk, Gregory, additional, Ouardi, Siham, additional, Balke, Benjamin, additional, Felser, Claudia, additional, Schönhense, Gerd, additional, Ikenaga, Eiji, additional, Sugiyama, Takeharu, additional, Kawamura, Naomi, additional, Suzuki, Motohiro, additional, Taira, Tomoyuki, additional, Uemura, Tetsuya, additional, Yamamoto, Masafumi, additional, Sukegawa, Hiroaki, additional, Wang, Wenhong, additional, Inomata, Koichiro, additional, and Kobayashi, Keisuke, additional

Published
2011
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17. Electronic structures ofFe3−xMxO4(M=Mn,Zn)spinel oxide thin films investigated by x-ray photoemission spectroscopy and x-ray magnetic circular dichroism

Author

Takaobushi, Junichi, primary, Ishikawa, Mizue, additional, Ueda, Shigenori, additional, Ikenaga, Eiji, additional, Kim, Jung-Jin, additional, Kobata, Masaaki, additional, Takeda, Yukiharu, additional, Saitoh, Yuji, additional, Yabashi, Makina, additional, Nishino, Yoshinori, additional, Miwa, Daigo, additional, Tamasaku, Kenji, additional, Ishikawa, Tetsuya, additional, Satoh, Issei, additional, Tanaka, Hidekazu, additional, Kobayashi, Keisuke, additional, and Kawai, Tomoji, additional

Published
2007
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21. Electronic structure of strained(La0.85Ba0.15)MnO3thin films with room-temperature ferromagnetism investigated by hard x-ray photoemission spectroscopy

Author

Tanaka, Hidekazu, primary, Takata, Yasutaka, additional, Horiba, Koji, additional, Taguchi, Munetaka, additional, Chainani, Ashish, additional, Shin, Shik, additional, Miwa, Daigo, additional, Tamasaku, Kenji, additional, Nishino, Yoshinori, additional, Ishikawa, Tetsuya, additional, Ikenaga, Eiji, additional, Awaji, Mitsuhiro, additional, Takeuchi, Akihisa, additional, Kawai, Tomoji, additional, and Kobayashi, Keisuke, additional

Published
2006
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