Magnetic moment of phonons in graphene induced by a magnetic field

被引：0
|
作者：
Peng, Feng [1 ]
机构：
[1] Beijing Univ Sci & Technol, Dept Phys, Beijing 100083, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2011年 / 406卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Phonon magnetic moment; Electron-phonon interaction; Magnetic field; Graphene; FUNCTIONAL-INTEGRAL APPROACH; SYSTEMS; TRANSPORT; MODEL;
D O I：
10.1016/j.physb.2011.02.073
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A magnetic field not only changes the electronic structure in graphene but also affects the phonon excitations via the electron-phonon interaction and even enables the phonons to generate magnetism. In this paper, we evaluate the magnetic moment of phonons in graphene using a generating-functional technique. The calculation results indicate that the phonon magnetic moment exists only in a weak magnetic field. The step-like change of the magnetic moment with the magnetic field reflects a macroscopic quantum effect. (C) 2011 Elsevier B.V. All rights reserved.
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页码：2107 / 2109
页数：3
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