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 |
Research Field |
Thin film/Surface and interfacial physical properties
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Research Institution | The University of Tokyo |
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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Project Status |
Completed (Fiscal Year 2013)
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Budget Amount *help |
¥27,690,000 (Direct Cost: ¥21,300,000、Indirect Cost: ¥6,390,000)
Fiscal Year 2013: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2012: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2011: ¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
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Keywords | 表面 / スピントロニクス / 物性実験 / 表面・界面 / ナノスケール電気伝導測定技術 / スピンエレクトロニクス / 表面・界面物性 |
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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Report
(4 results)
Research Products
(93 results)
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[Journal Article] Anisotropic Electronic Conduction in Metal Nanofilms Grown on a One-Dimensional Surface Superstructure2014
Author(s)
N. Nagamura, R. Hobara, T. Uetake, T. Hirahara, M. Ogawa, T. Okuda, K. He, P. Moras, P. M. Sheverdyaeva, C. Carbone, K. Kobayashi, I. Matsuda, and S. Hasegawa
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Journal Title
Physical Review B
Volume: 89
Issue: 12
DOI
Related Report
Peer Reviewed
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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
Issue: 16
Pages: 163106-163106
DOI
Related Report
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, K. Kobayashi
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Journal Title
Phys. Rev. Lett.
Volume: 109
Issue: 22
Pages: 227401-227401
DOI
Related Report
Peer Reviewed
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[Journal Article] Enhanced spin relaxation in a quantum metal film by the Rashba-type surface2011
Author(s)
N.Miyata, H.Narita, M.Ogawa, A.Harasawa, R.Hobara, T.Hirahara, P.Moras, D.Topwal, C.Carbone, S.Hasegawa, I.Matsuda
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Journal Title
Physical Review B
Volume: 83
Related Report
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
Related Report
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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)
Related Report
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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
Related Report
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[Presentation] Ultrathin films of topological insulators2011
Author(s)
T.Hirahara, Y.Sakamoto, Y.Takeichi, H.Miyazaki, S.Kimura, I.Matsuda, A.Kakizaki, S.Hasegawa
Organizer
International conference on the formation of semionductor interfaces
Place of Presentation
Prague, Czech
Year and Date
2011-07-04
Related Report
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