Nambu-Goldstone modes and the Josephson supercurrent in the bilayer quantum Hall system
Nambu-Goldstone modes and the Josephson supercurrent in the bilayer quantum Hall system
复制标题
双层量子霍尔系统中的南部-戈德斯通模式和约瑟夫森超电流
DOI：
10.1093/ptep/ptt025
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发表时间：
2013
影响因子：
3.5
通讯作者：
and Zyun F. Ezawa
中科院分区：
文献类型：
--
作者：
Yusuke Hama;George Tsitsishvili;and Zyun F. Ezawa
当填充因子ν= 1时，双层量子霍尔系统中自发地产生层间相位相干。另一方面，自旋和赝自旋自由度在填充因子ν= 2的双层量子霍尔系统的倾斜反铁磁相中相干纠缠。出现了一个复杂的Nambu-Goldstone模式与线性色散的零隧道相互作用的限制，这两种情况下。然后，它的相场在每一层中激发约瑟夫森超导电流，这就像超导体一样是无耗散的。利用Grassmannian方法，研究了双层量子霍尔系统中Nambu-Goldstone模与Josephson超电流的相位相干性及其对霍尔电阻的影响.
An interlayer phase coherence develops spontaneously in the bilayer quantum Hall system at the filling factorν= 1. On the other hand, the spin and pseudospin degrees of freedom are entangled coherently in the canted antiferromagnetic phase of the bilayer quantum Hall system at the filling factorν= 2. There emerges a complex Nambu–Goldstone mode with a linear dispersion in the zero tunneling-interaction limit for both cases. Then its phase field provokes a Josephson supercurrent in each layer, which is dissipationless as in a superconductor. We study what kind of phase coherence the Nambu–Goldstone mode develops in association with the Josephson supercurrent and its effect on the Hall resistance in the bilayer quantum Hall system atν= 1, 2, by employing the Grassmannian formalism.