Self-localization of composite spin-lattice polarons

被引：26

作者：

Prelovsek, P

Zeyher, R

Horsch, P

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[2] Jozef Stefan Inst, SI-1000 Ljubljana, Slovenia

[3] Univ Ljubljana, Fac Math & Phys, SI-1000 Ljubljana, Slovenia

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.96.086402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Self-localization of holes in the Holstein t-J model is studied in the adiabatic limit using exact diagonalization and the retraceable path approximation. It is shown that the critical electron-phonon coupling lambda(c) decreases with increasing J and that this behavior is determined mainly by the incoherent rather than by the coherent motion of the hole. The obtained spin correlation functions in the localized region can be understood within a percolation picture where antiferromagnetic order can persist up to a substantial hole doping. These results restrict the possibility of self-localization of holes in lightly doped cuprates.

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页码：1 / 4

页数：4

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