EXACT DIAGONALIZATION STUDY OF THE 2-DIMENSIONAL T-J-HOLSTEIN MODEL

被引：13

作者：

DOBRY, A ^{[1
]}

GRECO, A ^{[1
]}

KOVAL, S ^{[1
]}

RIERA, J ^{[1
]}

机构：

[1] UNIV NACL ROSARIO,CONSEJO NACL INVEST CIENT & TECN,DEPT FIS,RA-2000 ROSARIO,ARGENTINA

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.52.13722

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study by exact diagonalization the two-dimensional t-J-Holstein model near quarter filling by retaining only a few phonon modes in momentum space. This truncation allows us to incorporate the full dynamics of the retained phonon modes. The behavior of the kinetic energy, the charge structure factor, and other physical quantities show the presence of a transition from a delocalized phase to a localized phase at a finite value of the electron-phonon (e-ph) coupling. We have also given some indications that the e-ph coupling leads in general to a suppression of the pairing susceptibility at quarter filling.

引用

页码：13722 / 13725

页数：4

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