Spin Bose-glass phase in bilayer quantum Hall systems at nu=2
Spin Bose-glass phase in bilayer quantum Hall systems at nu=2
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nu=2 时双层量子霍尔系统中的自旋玻色玻璃相
DOI：
10.1103/physrevlett.82.3895
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发表时间：
1998
影响因子：
8.6
通讯作者：
S. Sarma
中科院分区：
文献类型：
--
作者：
E. Demler;S. Sarma
我们发展了一个有效的自旋理论来描述$\nu=2$量子霍尔双层系统的磁性。在没有无序的情况下，这一理论给出了定量协议与微观Hartree-Fock计算的结果，并为有限的无序，它预测存在一个新的自旋玻色玻璃相。玻色玻璃的特点是存在着平均反铁磁有序度为零的倾斜反铁磁相畴和短程平均反铁磁关联畴。它具有无限大的反铁磁横向磁化率和有限的纵向自旋磁化率，比热与温度成线性关系。从倾斜的反铁磁相的自旋玻色玻璃相的过渡的特征在于由纵向自旋电导的普适值。
We develop an effective spin theory to describe magnetic properties of the $\nu=2$ Quantum Hall bilayer systems. In the absence of disorder this theory gives quantitative agreement with the results of microscopic Hartree-Fock calculations, and for finite disorder it predicts the existence of a novel spin Bose glass phase. The Bose glass is characterized by the presence of domains of canted antiferromagnetic phase with zero average antiferromagnetic order and short range mean antiferromagnetic correlations. It has infinite antiferromagnetic transverse susceptibility, finite longitudinal spin susceptibility and specific heat linear in temperature. Transition from the canted antiferromagnet phase to the spin Bose glass phase is characterized by a universal value of the longitudinal spin conductance.