SELF-CONSISTENT D(X(2)-Y(2)) PAIRING IN A 2-DIMENSIONAL HUBBARD-MODEL

被引:294
作者
MONTHOUX, P [1 ]
SCALAPINO, DJ [1 ]
机构
[1] UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106
关键词
D O I
10.1103/PhysRevLett.72.1874
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Results of a conserving fluctuation exchange calculation for the superconducting state of a two-dimensional Hubbard model are presented. Self-consistent solutions for the full momentum- and frequency-dependent gap, renormalization, and frequency shift parameters have been obtained. The resulting frequency- and momentum-dependent gap is found to have d(x2-y2) symmetry. Below T(c), the maximum gap opens rapidly to a low temperature 2DELTA(0)/kT(c) value of order 10. We find that the effective interaction arising from the exchange of spin and charge fluctuations is stabilized by self-energy feedback effects as the superconducting gap opens.
引用
收藏
页码:1874 / 1877
页数:4
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