First Observation of the Fourfold-symmetric and Quantum Regime Vortex Core in YNi_2B_2C by Scanning Tunneling Microscopy and Spectroscopy(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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The local quasi-particle density of states, N_s (E, r), in the isolated vortex of YNi_2B_2C has been measured at 0.46 K by low-temperature scanning tunneling microscopy and spectroscopy The vortex core is found to be fourfold-symmetric star-shaped in real space Near E = 0 meV, N_s (E, r) extends toward <100> (the a-axis) and has a peak at the center of the vortex core. With increasing energy, N_s (E, r) comes to extend toward <110> and the peak of N_s (E, r) splits into four peaks toward <110>. N_s (E, r) in the vortex core exhibits electron-hole asymmetry with the intensity, indicating the first observation of the vortex core in a quantum regime.
- 社団法人日本物理学会の論文
- 2004-12-15
著者
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NISHIDA Nobuhiko
Department of Physics,University of Tokyo
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HIRATA Kazuto
Superconducting Materials Center, National Institute for Materials Science
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Takei H
Osaka Univ. Toyonaka
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Hirata K
National Inst. Materials Sci. Tsukuba Jpn
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Hirata Kazuto
Superconducting Materials Center National Institute For Materials Science
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Nishida N
Tokyo Inst. Of Technol. Tokyo
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Nishida N
The Institute For Soild State Physics The University Of Tokyo:faculty Of Science Tokyo Insutitute Of
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Nishida Nobuhiko
Department Of Physics University Of Tokyo
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Nishida Nobuhiko
Department Of Physics Faculty Of Science Tokyo Institute Of Technology
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NISHIMORI Hitoshi
Department of Physics, Tokyo Institute of Technology
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UCHIYAMA Kazuharu
Department of Physics, Tokyo Institute of Technology
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KANEKO Shin-ichi
Department of Physics, Tokyo Institute of Technology
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TOKURA Akio
Department of Physics, Tokyo Institute of Technology
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TAKEYA Hiroyuki
Superconducting Materials Center, National Institute for Materials Science
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Kaneko Shin-ichi
Department Of Physics Tokyo Institute Of Technology
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Takeya H
National Institute For Materials Science
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Uchiyama K
Department Of Physics Faculty Of Science Saitama University
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Kaneko Shin-ichi
Department Of Physics Faculty Of Science Hiroshima University
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Tokura Akio
Department Of Physics Tokyo Institute Of Technology
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Nishimori Hitoshi
Department Of Physics Tokyo Institute Of Technology
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Takeya Hiroyuki
Superconducting Materials Center National Institute For Materials Science
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