Spin-pseudospin coherence and CP3 Skyrmions in bilayer quantum Hall ferromagnets

被引：44

作者：

Ezawa, ZF ^{[1
]}

机构：

[1] Tohoku Univ, Dept Phys, Sendai, Miyagi 980, Japan

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 17期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.82.3512

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze bilayer quantum Hall ferromagnets, whose underlying symmetry group is SU(4). Spin-pseudospin coherence develops spontaneously when the total electron density is low enough. The quasiparticles are CP3 Skyrmions. One Shyrmion induces charge modulations on both layers. At the filling factor nu = 2/m one elementary excitation consists of a pair of Skyrmions and its charge is 2e/m. Recent experimental data due to Sawada et at. [Phys. Rev. Lett. 80, 4534 (1998)] support this conclusion.

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收藏

页码：3512 / 3515

页数：4

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