2013 Fiscal Year Final Research Report
Development of a spin-polarized scanning tunneling potentiometry system and its application to micro fabricated surface Rashba systems
| Project/Area Number |
23686007
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Thin film/Surface and interfacial physical properties
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| Research Institution | The University of Tokyo |
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Principal Investigator |
HIRAHARA Toru 東京大学, 理学(系)研究科(研究院), 助教 (30451818)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 表面 / スピントロニクス |
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| Research Abstract |
The purpose of the present project is to perform scanning tunneling potentiometry (STP) measurements on surface Rashba systems and explore the intriguing nature of its charge/spin transport phenomena. Therefore we have newly constructed a scanning tunneling microscope (STM) and furthermore, made our own measurement system for STP measurements. We have shown that it is possible to simultaneously map the surface topography with STM while mapping the potential distribution with STP when applying electrical current through the surface. Using ultrathin Bi films formed on Si(111) substrates, we have shown that the potential gradient can be measured properly. We have additionally found a way to micro fabricate surface states in situ and measure the spin Hall effect using nonlocal transport measurements using ultrathin Bi2Se3 films.
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[Journal Article] Evidence of Dirac fermions in multilayer silicene2013
Author(s)
P. De Padova, P. Vogt, A. Resta, J. Avila, I. Razado-Colambo, C. Quaresima, C. Ottaviani, B. Olivieri, T. Bruhn, T. Hirahara, T. Shirai, S. Hasegawa, M. C. Asensio, and G. Le Lay
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Journal Title
Appl. Phys. Lett
Volume: 102
Pages: 163106
DOI
Peer Reviewed
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[Journal Article] Atomic and Electronic Structure of Ultrathin Bi(111) Films Grown on Bi_2Te_3(111) Substrates : Evidence for a Strain-Induced Topological Phase Transition2012
Author(s)
T. Hirahara, N. Fukui, T. Shirasawa, M. Yamada, M. Aitani, H. Miyazaki, M. Matsunami, S. Kimura, T. Takahashi, S. Hasegawa, and K. Kobayashi
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Journal Title
Phys. Rev. Lett
Volume: 109
Pages: 227401
DOI
Peer Reviewed
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[Presentation] Surface-State Superconductivity2013
Author(s)
M. Yamada, T. Hirahara, R. Hobara, and S. Hasegawa
Organizer
The 14th International Conference on the Formation of Semiconductor Interfaces (ICFSI-14)
Place of Presentation
Gyeongyu, Korea
Year and Date
2013-07-04
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[Presentation] Ultrathin Films of Topological Insulators2011
Author(s)
T. Hirahara, Y. Sakamoto, M. Yamada, Miyazaki, Y. Takeichi, S. Kimura, Matsuda, A. Kakaizaki, S. Hasegawa
Organizer
The 13th International Conference on the Formation of Semiconductor Interfaces (ICFSI13)
Place of Presentation
Prague, Czech Republic
Year and Date
2011-07-04
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