Anderson impurity in a helical metal

被引：46
作者：
Feng, Xiao-Yong [1 ,2 ,3 ]
Chen, Wei-Qiang [2 ,3 ]
Gao, Jin-Hua [2 ,3 ]
Wang, Qiang-Hua [4 ,5 ]
Zhang, Fu-Chun [2 ,3 ]
机构：
[1] Normal Univ Hangzhou, Dept Phys, Hangzhou 310036, Zhejiang, Peoples R China
[2] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
[3] Univ Hong Kong, Ctr Theoret & Computat Phys, Hong Kong, Hong Kong, Peoples R China
[4] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
[5] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
来源：
PHYSICAL REVIEW B | 2010年 / 81卷 / 23期
关键词：
SINGLE DIRAC CONE; TOPOLOGICAL-INSULATOR; MAGNETIC-SUSCEPTIBILITY; KONDO PROBLEM; MODEL; SURFACE; REGIME; EXPANSION; BI2SE3; STATES;
D O I：
10.1103/PhysRevB.81.235411
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We use a trial wave function to study the spin-1/2 Kondo effect of a helical metal on the surface of a three-dimensional topological insulator. While the impurity spin is quenched by conduction electrons, the spin-spin correlation of the conduction electron and impurity is strongly anisotropic in both spin and spatial spaces. As a result of strong spin-orbit coupling, the out-of-plane component of the impurity spin is found to be fully screened by the orbital angular momentum of the conduction electrons.
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页数：5
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