Magnetic transition and polaron crossover in a two-site single polaron model including double exchange interaction

被引：8

作者：

Chatterjee, J ^{[1
]}

Mitra, M ^{[1
]}

Das, AN ^{[1
]}

机构：

[1] Saha Inst Nucl Phys, Kolkata 700064, W Bengal, India

来源：

EUROPEAN PHYSICAL JOURNAL B | 2000年 / 18卷 / 04期

关键词：

D O I：

10.1007/s100510070004

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A two-site double exchange model with a single polaron is studied using a perturbation expansion based on the modified Lang-Firsov transformation. the antiferromagnetic to ferromagnetic transition and the crossover fro small to large polaron are investigated for different values of the antiferromagnetic interaction (J) between the core spins and the hopping (t) of the itinerant electron. Effect of the external magnetic field on the small to large polaron crossover and on the polaronic kinetic energy are studied. When the magnetic field has vary pronounced effect on the dynamics of polarons.

引用

页码：573 / 578

页数：6

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