Structure of Cooper Pairs in Superconductors
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概要
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In the generalized random-phase approximation, introduced by Anderson and applied to the theory of superconductivity, existence of a collective excitation with vanishing excitation energy and momentum was known. It is shown to correspond to the creation of a Cooper pair. The creation operator satisfies a nonlinear operator equation which dose not depend on the magnitude of order parameter. It is, therefore, independent of dynamics, that is, of the strength of the pairing interactions. Nevertheless it has the assumed matrix elements between a given state in an N-particle system and the corresponding state in the N+2 particle system. Discussions are confined to the BCS superconductor at absolute zero temperature.
- 一般社団法人日本物理学会の論文
- 1972-07-25
著者
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Wada Yasushi
Department of Materials Science,Faculty of Science,Hiroshima University
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WADA Yasushi
Department of Physics, University of Tokyo
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