2012 Fiscal Year Final Research Report
Study of novel low-dimensional surface structure showing metal-insulator transition
| Project/Area Number |
22740205
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics I
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| Research Institution | Japan Atomic Energy Agency |
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Principal Investigator |
FUKAYA Yuki 独立行政法人日本原子力研究開発機構, 先端基礎研究センター, 研究副主幹 (40370465)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 表面・界面 / 陽電子 |
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| Research Abstract |
In this study, in order to elucidate the atomic structure of one-dimensional atomic wires on a crystal surface and its displacements due to the metal-insulator transition, the Pt/Ge(001) surface has been investigated by using reflection high-energy positron diffraction (RHEPD). By using the scanning tunneling microscopy (STM), we confirmed that defect-free and long-range ordered atomic wires are formed on the Pt/Ge(001) surface. By means of the rocking curve analyses based on the dynamical diffraction theory, we found that the experimental curve at room temperature can be well explained by considering the Ge dimer model expected by the theoretical calculations. We also found that below 90 K the Pt/Ge(111) surface undergoes the phase transition from the symmetric to asymmetric dimer structure.
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Research Products
(33 results)
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[Journal Article] Atomic structure of two-dimensional binary surface alloy : Si(111)-√21×√21 superstructure2012
Author(s)
Y. Fukaya, I. Matsuda, M. Hashimoto, K. Kubo, T. Hirahara, S. Yamazaki, W. H. Choi, H. W. Yeom, S. Hasegawa, A. Kawasuso, and A. Ichimiya
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Journal Title
Surface Science
Volume: 606
Pages: 919-923
DOI
Peer Reviewed
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[Journal Article] Increase in the beam intensity of the linac-based slow positron beam and its application at the Slow Positron Facility, KEK2012
Author(s)
K. Wada, T. Hyodo, A. Yagishita, M. Ikeda, S. Ohsawa, T. Shidara, K. Michishio, T. Tachibana, Y. Nagashima, Y. Fukaya, M. Maekawa, and A. Kawasuso
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Journal Title
The European Physical Journal D
Volume: 66
Pages: 37(4)
DOI
Peer Reviewed
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[Journal Article] Electron compound nature in a surface atomic layer of a two-dimensional hexagonal lattice2010
Author(s)
I. Matsuda, F. Nakamura, K. Kubo, T. Hirahara, S. Yamazaki, W. H. Choi, H. W. Yeom, H. Narita, Y. Fukaya, M. Hashimoto, A. Kawasuso, M. Ono, Y. Hasegawa, S. Hasegawa, and K. Kobayashi
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Journal Title
Physical Review B
Volume: 82
Pages: 165330(6)
DOI
Peer Reviewed
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[Presentation] Atomic and electronic structures of Si(111)-√21×√21-(Au,Ag) superstructure2011
Author(s)
Y. Fukaya, I. Matsuda, K. Kubo, T. Hirahara, S. Yamazaki, W. H. Choi, H. W. Yeom, S. Hasegawa, and A. Kawasuso
Organizer
International Symposium on Surface Science -Towards Nano-, Bio- and Green Inovation- (ISSS-6)
Place of Presentation
Tokyo
Year and Date
2011-12-13
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