2015 Fiscal Year Final Research Report
Spectroscopic study on unusual spin-charge-orbital states at surfaces of transition-metal compounds
| Project/Area Number |
25400356
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Waseda University (2015)
The University of Tokyo (2013-2014) |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 遷移金属化合物 / スピン・電荷・軌道 / 光電子分光 / Ｘ線吸収分光 / 表面・界面 / 超伝導 / 磁性 / エキシトニック相 |
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| Outline of Final Research Achievements |
We have found the important role of O 2p hole in the Li-ion battery cathode material Li cobaltite by means of O 1s x-ray absorption spectroscopy. We have revealed the nature of stripe-type charge-orbital order of Ir 5d and Te 5p holes in a triangular lattice Ir telluride. We have also have investigated the relationship between the strong spin-orbit interaction and the multi-band Fermi surface in the superconducting phase obtained by suppressing the charge-orbital ordering in the Ir telluride. We have studied the relationship between the Fe 3d/Bi 6p orbital degeneracy and the inhomogeneous electronic states in the square lattice Fe chalcogenide/Bi chalcogenide superconductors by means of angle-resolved photoemission spectroscopy and x-ray absorption spectroscopy.
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| Free Research Field |
強相関電子系
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