Ordered Vortex Lattice and Intrinsic Vortex Core States in Bi_2Sr_2CaCu_2O_x Studied by Scanning Tunneling Microscopy and Spectroscopy
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概要
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The ordered vortex lattice in Bi_2Sr_2CaCu_2O_x (overdoped, T_c = 83 K) has been observed for the first time at 4.2 K in 8 T by scanning tunneling spectroscopy (STS). The vortex lattice is short-range ordered in the length scale of 100 nm. The vortices form an almost square lattice with the sides parallel to the diagonal direction of the CuO_2 square lattice, that is, the nodal direction of the d_<x^2-y^2> superconductor. In all of the vortex cores of the ordered lattice, the localized states are observed at ±9 meV symmetrically in the superconducting gap and are clearly determined to be intrinsic to the vortex in Bi_2Sr_2CaCu_2O_x. The intensity is found to be electron-hole asymmetric.
- 社団法人日本物理学会の論文
- 2003-09-15
著者
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NISHIDA Nobuhiko
Department of Physics,University of Tokyo
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西森 拓
広島大学理学研究科数理分子生命理学専攻
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西森 拓
大阪府立大学工学研究科
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SAKATA Hideaki
Department of Physics, Tokyo University of Science
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Kosugi N
Tokyo Inst. Of Technol. Tokyo
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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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Shiozawa Hidetsugu
Department Of Physics Tokyo Metropolitan University
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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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MATSUBA Ken
Department of Physics, Tokyo Institute of Technology
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KOSUGI Naoto
Department of Physics, Tokyo Institute of Technology
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Matsuba K
Department Of Physics Tokyo Institute Of Technology
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Matsuba Ken
Department Of Physics Tokyo Institute Of Technology
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Sakata H
Department Of Physics Tokyo Institute Of Technology
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Sakata Hideaki
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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Kosugi Naoto
Department Of Physics Tokyo Institute Of Technology
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Nishida Nobuhiko
Department of Physics, Tokyo Institute of Technology
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