Spin exchange and superconductivity in a t-J′-V model for two-dimensional quarter-filled systems -: art. no. 144502

被引：11

作者：

Greco, A

Merino, J

Foussats, A

McKenzie, RH

机构：

[1] Univ Nacl Rosario, CONICET, Fac Ciencias Exactas Ingn & Agrimensura, RA-2000 Rosario, Argentina

[2] Univ Nacl Rosario, CONICET, Inst Fis Rosario, RA-2000 Rosario, Argentina

[3] Univ Autonoma Madrid, Dept Fis Teor Mat Condensada, E-28049 Madrid, Spain

[4] Univ Queensland, Dept Phys, Brisbane, Qld 4072, Australia

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.71.144502

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of antiferromagnetic spin fluctuations on two-dimensional quarter-filled systems is studied theoretically. An effective t-J(')-V model on a square lattice which accounts for checkerboard charge fluctuations and next-nearest-neighbor antiferromagnetic spin fluctuations is considered. From calculations based on large-N theory on this model it is found that the exchange interaction J(') increases the attraction between electrons in the d(xy) channel only, so that both charge and spin fluctuations work cooperatively to produce d(xy) pairing.

引用

页数：8

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