Excitations in a quantum Hall ferromagnet with strong Coulomb interaction

被引：10

作者：

Iordanski, SV ^{[1
]}

Kasbuba, A ^{[1
]}

机构：

[1] Russian Acad Sci, LD Landau Theoret Phys Inst, Moscow 117334, Russia

来源：

JETP LETTERS | 2002年 / 75卷 / 07期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/1.1485265

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A quantum Hall ferromagnet is considered at integer fillings nu, provided typical Coulomb interaction energy E-c is large compared to the cyclotron energy omega(H). Low-energy collective modes consist of a magnetoplasmon exciton and a gapless spin exciton. All charged excitations have a gap. The activation energy gap for a pair of charged topological excitations-skyrmion and antiskyrmion-is small, i.e., Delta < vomega(H). The electric charge of a skyrmion is the multiple q = evQ, where Q is the integer topological charge. (C) 2002 MAIK "Nauka / Interperiodica".

引用

页码：348 / 353

页数：6

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