CONSTRAINTS ON S-WAVE PAIRING IN THE HUBBARD-MODEL

被引：30

作者：

ZHANG, SC

机构：

[1] IBM Almaden Research Center, Department K35, San Jose, CA 95120

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.42.1012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present an exact identity between the on-site and the extended s-wave pairing amplitudes in the Hubbard model. We prove that the extended s-wave pairing amplitude vanishes identically at half filling for both signs of U. Away from half filling, the existence of an on-site s-wave pairing is a necessary and sufficient condition for the existence of an extended s-wave pairing. This result gives rise to constraints on the possible symmetries of the superconducting gap in the Hubbard model. © 1990 The American Physical Society.

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页码：1012 / 1014

页数：3

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