2013 Fiscal Year Final Research Report
Fabrication and electronic-structure analysis of topological nano-ribbon
| Project/Area Number |
24654096
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics II
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| Research Institution | Tohoku University |
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Principal Investigator |
SOUMA Seigo 東北大学, 原子分子材料科学高等研究機構, 助教 (20431489)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 角度分解光電子分光 / トポロジカル絶縁体 / 界面 / スピントロニクス |
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| Research Abstract |
Despite of a huge effort for searching new topological materials carrying spin-helical Dirac fermions, mostly discovered are 3D materials by observing the surface state of topological insulator with angle-resolved photoemission spectroscopy. While the 2D topological system was theoretically proposed for several thin-film systems, a realization of such materials has been limited to very few systems mainly due to the difficulty in observing 1D edge state. In this research project, we have performed high-resolution spin-resolved ARPES on several topological insulators and thin film systems in order to elucidate the expected 1D-edge state which would emerge on nano-ribbon structure with a non-trivial topological nature. We have successfully determined bulk and surface/edge electronic structure in several topological insulators and related materials.
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[Journal Article] Evolution of electronic structure upon Cu doping in the topological insulator Bi_2Se_32012
Author(s)
Y. Tanaka, K. Nakayama, S. Souma, T. Sato, N. Xu, P. Zhang, P. Richard, H. Ding, Y. Suzuki, P. Das, K. Kadowaki, and T. Takahashi
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Journal Title
Phys. Rev. B
Volume: vol. 85
Pages: 125111-1-5
DOI
Peer Reviewed
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