2014 Fiscal Year Final Research Report
Exploration of Novel Topological Insulators
Project/Area Number |
24340078
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Partial Multi-year Fund |
Section | 一般 |
Research Field |
Condensed matter physics II
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Research Institution | Tokyo Institute of Technology |
Principal Investigator |
SASAGAWA Takao 東京工業大学, 応用セラミックス研究所, 准教授 (30332597)
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Project Period (FY) |
2012-04-01 – 2015-03-31
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Keywords | トポロジカル絶縁体 / 単結晶 / 第一原理計算 / 量子構造観察 / 物質開拓 |
Outline of Final Research Achievements |
Because of the excellent electronic conduction resulting from massless Dirac fermions, Graphene is a promising candidate material for next generation (post-silicon) electronic devices. As a beyond-Graphene technology, we tried to develop both new compounds and novel electronic functionality within a new class of materials called "topological insulators". Highlights of this work are as follows: (1) A "polar" topological insulator was for the first time materialized, which could make topological electronic devices quite simple [Nature Physics]. (2) Unlike Graphene, the massless Dirac fermions in the topological insulators were proved to be quite stable against the imperfection of the materials. It was further demonstrated that the Dirac surface state and associated spin distribution could be locally (in nano-scale) manipulated by the bias voltage and magnetic field [ACS Nano, Nature Physics].
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Free Research Field |
物質科学
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