Spin-Pseudospin Coherence and CP$^{3}$ Skyrmions in Bilayer Quantum Hall Ferromagnets

Дата и время публикации : 1998-12-11T02:18:59Z

Авторы публикации и институты :
Z. F. Ezawa

Ссылка на журнал-издание: Phys. Rev. Lett. 82 (1999) 3512
Коментарии к cтатье: 4 pages including 2 figures (published version)
Первичная категория: cond-mat.mes-hall

Все категории : cond-mat.mes-hall, cond-mat.str-el

Краткий обзор статьи: 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. Quasiparticles are CP^3 skyrmions. One skyrmion induces charge modulations on both of the two 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 al. [Phys. Rev. Lett. {bf 80}, 4534 (1998)] support this conclusion.

Category: Physics