Effective Interactions and the Nature of Cooper Instability of Spin Polarons in the 2D Kondo Lattice

被引：12

作者：

Val'kov, V. V. ^{[1
,2
,3
]}

Korovushkin, M. M. ^{[1
]}

Barabanov, A. F. ^{[4
]}

机构：

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

[2] Siberian Fed Univ, Krasnoyarsk 660041, Russia

[3] Siberian State Airspace Univ, Krasnoyarsk 660074, Russia

[4] Russian Acad Sci, Inst High Pressure Phys, Troitsk 142190, Moscow Region, Russia

来源：

JETP LETTERS | 2008年 / 88卷 / 06期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/S0021364008180069

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

It has been shown that two- and three-center interactions arise in the strong-coupling regime for the 2D Kondo lattice; these interactions both induce and suppress the Cooper instability. It is important that, in contrast to the t-J* model, the three- center interactions promote the Cooper pairing and ensure the appearance of the superconducting phase with a high critical temperature T-c. The calculated concentration dependences of T-c agree well with the experimental data for the cuprate superconductors.

引用

页码：370 / 374

页数：5

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