Superconductivity and Spin Density Wave in Two Dimensional Hubbard Model
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概要
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An interplay between the superconductivity and spin density wave (SDW) is studiedfrom the perturbative point of view based on the two dimensional Hubbard model. Itis shown that the d-pairing superconductivity is induced by spin fluctuations near theSDW boundary. 'I'he superconducting transition temperature (7'.) is found to beremarkably suppressed by the renormalization through the electron self-energy, andto be sensitive to the band parameters due to nesting of the Fermi surface and thepresence of the van Hove singularity as well as to the Fermi energy and the on-site interaction. As a consequence T. is enhanced by the next-nearest-neighbour hopping integral. The relation between the present result and experiments of high T. superconductors is discussed.
- 社団法人日本物理学会の論文
- 1988-03-15
著者
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Shimahara Hiroshi
Institute Of Physics University Of Tsukuba
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Takada Satoshi
Institute Of Physics University Of Tsukuba
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