2013 Fiscal Year Final Research Report
Spin-polarized surface states of germanium substrate modified by surface adsorbates
| Project/Area Number |
24740197
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics I
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| Research Institution | The University of Tokyo |
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Principal Investigator |
YAJI Koichiro 東京大学, 物性研究所, 助教 (50447447)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | スピン軌道相互作用 / 半導体表面 / 表面電子 / 角度分解光電子分光 / スピン分解光電子分光 |
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| Research Abstract |
Spin-polarized surface states of heavy-element-atoms adsorbed semiconductor substrates have been studied. A monolayer Pb adsorbed Ge(111) surface exhibits two-dimensional electronic states localized in subsurface layers of a Ge(111) substrate. In addition, the surface-state bands are split into two due to the Rashba effect. For Pt-induced nanowires formed on Ge(001) surface, we found several one-dimensional metallic bands. One of the metallic bands is accurately one-dimensional and behaves as the Fermi gas. In addition, another quasi-one-dimensional metallic band shows the Rashba-type spin splitting. These results are essential to a new scientific field such as surface spin transport, filtering and injection into semiconductors.
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