2016 Fiscal Year Final Research Report
Peculiar electron spin properties in Rashba systems with valley degree of freedom
| Project/Area Number |
25287070
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | Chiba University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
小田 竜樹 金沢大学, 数物科学系, 教授 (30272941)
小野 新平 一般財団法人電力中央研究所, 材料科学研究所, 主任研究員 (30371298)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Keywords | 表面・界面物性 / スピン軌道相互作用 / バレー自由度 / スピン偏極バンド / スピントロニクス |
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| Outline of Final Research Achievements |
The electronic structures and physical properties of low-dimensional nano-structures formed on solid surface have been investigated both experimentally and theoretically. The addition of valley degree of freedom by controlling the symmetry of the nano-structures, leads to the observation of extraordinary Rashba effect, such as non-vortical valley spin structure and 100 % spin polarized metallic valley structure. These effects, which are concluded to result from the lack of either the rotational symmetry or the mirror symmetry, suppress the backscattering probability of electron spins and thus open a great avenue to realize semiconductor spintronics devices. We also succeeded to form a two-dimensional honeycomb network with cyclic thiazyl biradical molecules, and showed this honeycomb network to have Dirac fermion and thus to behave like a molecular graphene.
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| Free Research Field |
表面物理学
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