RESONANT ZERO-SOUND EXCHANGE IN THE 1/N EXPANSION OF THE INFINITE-U HUBBARD-MODEL

被引：3

作者：

RASUL, JW

HUANG, WN

机构：

[1] Department of Physics, University of Michigan, Ann Arbor

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.43.11319

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the infinite-U Hubbard model away from half-filling within the 1/N expansion. At order 1/N2 we find a substantial contribution to the Cooper-pair scattering amplitude arising from the resonant exchange of two zero-sound modes. This contribution is repulsive and can be identified with strong ferromagnetic spin fluctuations.

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页码：11319 / 11322

页数：4

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