Crossover from symplectic to orthogonal class in a two-dimensional honeycomb lattice

被引:429
作者
Suzuura, H [1 ]
Ando, T [1 ]
机构
[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
关键词
D O I
10.1103/PhysRevLett.89.266603
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We have calculated the weak-localization correction to the conductivity for disordered electrons in a two-dimensional honeycomb lattice and shown that it can be either positive or negative depending on the interaction range of impurity potentials. From symmetry considerations, the symplectic class turns out to be realized at nonzero temperatures and crossover to the orthogonal class is predicted with decreasing temperature.
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页码:1 / 266603
页数:4
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