Spin-Pseudospin Coherence and C P-3 Skyrmions in Bilayer Quantum Hall Ferromagnets
Spin-Pseudospin Coherence and C P-3 Skyrmions in Bilayer Quantum Hall Ferromagnets
复制标题
双层量子霍尔铁磁体中的自旋-赝自旋相干性和 C P-3 斯格明子
DOI：
10.1103/physrevlett.82.3512
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发表时间：
1998
影响因子：
8.6
通讯作者：
Z. F. Ezawa
中科院分区：
文献类型：
--
作者：
Z. F. Ezawa
我们分析了底层对称群为SU(4)的双层量子霍尔铁磁体。当总电子密度足够低时，自旋-伪自旋相干自发形成。准粒子是Cp^3天空粒子。一个Skyrmion在两层上都会引起电荷调制。在填充因子$\nu=2/m$时，一个基元激发由一对Skyrmions组成，其电荷为$2e/m$。最近的实验数据归因于Sawada等人。[物理。莱特牧师。4534(1998)]支持这一结论。
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.