Theoretical study and design of novel properties of topological insulators
| Project/Area Number |
22540327
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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 | Tokyo Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2010-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
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| Keywords | トポロジカル絶縁体 / 表面状態 / 輸送現象 / 熱電変換 / 量子ホール系 |
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| Outline of Final Research Achievements |
We found that metallic 1D states on dislocations in three-dimensional topological insulators enhance the thermoelectric figure of merit at low temperature. We also found that the interface states between two topological insulators depends on the chiralities of surface Dirac cones. In particular, when the “interfacial symmetry” is preserved at the interface, we find that the band structure of the interface states closes its gap on a loop, which is unexpected for usual interface states. Finally, we studied the Weyl semimetals from the viewpoint of the topology. We calculated the general form of the band dispersion of its surface Fermi arcs, and the change of the Fermi arcs upon change of some parameter, and their dependence on the surface terminations.
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Report
(5 results)
Research Products
(40 results)
