STM Study of Anisotropic Superconducting Gap of Bi_2Sr_2CaCu_2O_8
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概要
- 論文の詳細を見る
The electron tunneling study was carried out on Bi_2Sr_2CaCu_2O_8 with use of the scanning tunneling microscope. Both the cleaved and lateral surface of single crystal were investigated. The electronic density of states for the superconducting phase was correctly obtained at the lateral surface. It shows the finite gap on the whole Fermi surface clearly, while the gap has a considerable anisotropy. The temperature dependence of the magnetic field penetration depth was also measured and its thermally activated behavior confirmed the finite gap again. These results indicate the large s-wave component in the pair wave function and the fair contribution of d-wave as well. The attractive force between electrons is not only due to the on-site interaction, but also the extended one.
- 社団法人日本物理学会の論文
- 1993-10-15
著者
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Ichimura Koichi
Department Of Hematology And Rheumatology Tohoku University Graduate School Of Medicine
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Ichimura Koichi
Department Of Physics Hokkaido University
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NOMURA Kazushige
Department of physics,Tokyo Metropolitan University
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Nomura K
Univ. Tokyo Tokyo
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Nomura Kazushige
Department Of Physics Faculty Of Science University Of Tokyo
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Nomura Kazushige
Department of Condensed Matter Physics, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
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