Density of states in coupled chains with off-diagonal disorder

被引:58
作者
Brouwer, PW [1 ]
Mudry, C
Furusaki, A
机构
[1] Harvard Univ, Lyman Lab Phys, Cambridge, MA 02138 USA
[2] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan
关键词
D O I
10.1103/PhysRevLett.84.2913
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We compute the density of states rho(epsilon) in N coupled chains with random hopping. At zero energy, rho(epsilon) shows a singularity that strongly depends on the parity of N. For odd N, rho(epsilon) proportional to 1/\epsilon ln(3)epsilon\, with and without time-reversal symmetry. For even N, rho(epsilon) proportional to \ln epsilon\ in the presence of time-reversal symmetry, while there is a pseudogap, rho(epsilon) proportional to \epsilon ln epsilon\, in the absence of time-reversal symmetry.
引用
收藏
页码:2913 / 2916
页数:4
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