2010 Fiscal Year Final Research Report
Oxygen isotope effect on the electronic structure of high-T_c cuprates studied by angle-resolved photoemission spectroscopy
| Project/Area Number |
19340105
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
AIURA Yoshihiro National Institute of Advanced Industrial Science and Technology, エレクトロニクス研究部門, 主任研究員 (80356328)
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| Co-Investigator(Kenkyū-buntansha) |
EISAKI Hiroshi 独立行政法人産業技術総合研究所, エレクトロニクス研究部門, 主任研究員 (20242018)
MASUI Takahiko 国立大学法人大阪大学, 大学院・理学研究科, 助教 (10403099)
YOSHIDA Yoshiyuki 独立行政法人産業技術総合研究所, エレクトロニクス研究部門, 研究員 (50415767)
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| Research Collaborator |
IWASAWA Hideaki 国立大学法人広島大学, 放射光科学研究センター, 研究員 (90514068)
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| Project Period (FY) |
2007 – 2010
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| Keywords | 酸化物高温超伝導 / 角度分解光電子分光 / 電子構造 / 酸素同位体効果 / 電子格子相互作用 |
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| Research Abstract |
Angle-resolved photoemission spectroscopy with low-energy tunable photons along the nodal direction of oxygen isotope substituted Bi_2Sr_2CaCu_2O_<8+δ> reveals a distinct oxygen isotope shift near the electron-boson coupling "kink" in the electronic dispersion. The magnitude (a few meV) and direction of the kink shift are as expected due to the measured isotopic shift of phonon frequency, and are also in agreement with theoretical expectations. This demonstrates the participation of the phonons as dominant players, as well as pinpointing the most relevant of the phonon branches.
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[Journal Article] Interplay among Coulomb Interaction, Spin-Orbit Interaction, and Multiple Electron-Boson Interactions in Sr_2RuO_42010
Author(s)
H.Iwasawa, Y.Yoshida, I.Hase, S.Koikegami, H.Hayashi, J.Jiang, K.Shimada, H.Namatame, M.Taniguchi, Y.Aiura
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Journal Title
Phys.Rev.Lett. 105
Pages: 226406
Peer Reviewed
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[Journal Article] Enhancement of oxygen isotope effect due to out-of-plane disorder in Bi_2Sr_2Ln_0.4CuO_6+δ superconductors2009
Author(s)
K.Sato, H.Iwasawa, N.C.Plumb, T.Masui, Y.Yoshida, H.Eisaki, H.Bando, A.Ino, M.Arita, K.Shimada, H.Namatame, M.Taniguchi, S.Tajima, Y.Nishihara, D.S.Dessau, Y.Aiura
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Journal Title
Phys.Rev. B80
Pages: 212501
Peer Reviewed
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[Journal Article] Isotopic Fingerprint of Electron-Phonon Coupling in High-T_c Cuprates2008
Author(s)
H.Iwasawa, J.F.Douglas, K.Sato, T.Masui, Y.Yoshida, Z.Sun, H.Eisaki, H.Bando, A.Ino, M.Arita, K.Shimada, H.Namatame, M.Taniguchi, S.Tajima, S.Uchida, T.Saitoh, D.S.Dessau, Y.Aiura
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Journal Title
Phys.Rev.Lett. 101
Pages: 157005
Peer Reviewed
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