A quantum phase transition in a model with boson-controlled hopping

被引：29

作者：

Edwards, DM ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci & Technol, Dept Math, London SW7 2AZ, England

来源：

PHYSICA B-CONDENSED MATTER | 2006年 / 378-80卷

基金：

英国工程与自然科学研究理事会;

关键词：

quantum phase transition; non-Fermi liquid;

D O I：

10.1016/j.physb.2006.01.307

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A model is introduced in which an electron emits or absorbs a local boson every time it hops between lattice sites. The velocity of coherent electron propagation is governed by a control parameter lambda. which determines the rate of boson decay. It is shown how a quantum phase transition between two Fermi liquids, with different Fermi surfaces, can occur at lambda with non-Fermi liquid behaviour persisting down to temperature T = 0 at the critical point. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：133 / 134

页数：2

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