2012 Fiscal Year Final Research Report
Photoinduced phenomena originated from electron geometrical phases
| Project/Area Number |
22540340
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 I
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
INOUE Junichi 独立行政法人物質・材料研究機構, 理論計算科学ユニット, 主任研究員 (90323427)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 光物性 |
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| Research Abstract |
For two-dimensional topological insulators and a surface state states on three-dimensional topological insulators, we demonstrated that an electron and spin Hall current can be controlled by an application of continuous laser beam. Underline physics of these phenomena is that the application of the laser field turns a electron hopping energy into a variable, and thus topological invariants that are uniquely fixed by given material parameters in turn become externally controllable variables. Consequently, we can expect quantized electron and spin Hall current can be photo-induced under an appropriate condition.
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