Effect of long-range interactions on the Kohn-Luttinger mechanism of the cooper instability in the Shubin-Vonsowsky model

被引：8

作者：

Kagan, M. Yu. ^{[1
]}

Val'kov, V. V. ^{[2
,3
]}

Mitskan, V. A. ^{[2
,3
]}

Korovushkin, M. M. ^{[2
,3
]}

机构：

[1] Russian Acad Sci, Kapitza Inst Phys Problems, Moscow 119334, Russia

[2] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

[3] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia

来源：

JETP LETTERS | 2013年 / 97卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

T-J MODEL; HUBBARD-MODEL; SUPERFLUID TRANSITION; FERMI GAS; SUPERCONDUCTIVITY;

D O I：

10.1134/S0021364013040085

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The problem of Cooper instability is studied by implementing the Kohn-Luttinger mechanism in the framework of the Shubin-Vonsowsky model taking into account the intersite Coulomb interactions within the first and second coordination spheres. It is shown that the Kohn-Luttinger renormalization for the effective interaction in the second-order terms of perturbation theory, as well as the inclusion of intersite hoppings in the second and third coordination spheres, significantly affects the interplay between the superconducting phases with d (xy) -, p-, s-, and -wave symmetries of the order parameter.

引用

页码：226 / 232

页数：7