Density of states in coupled chains with off-diagonal disorder
Disordered Systems and Neural Networks
2009-10-31 v1 Mesoscale and Nanoscale Physics
Abstract
We compute the density of states (d.o.s.) in N coupled chains with random hopping. At zero energy, the d.o.s. shows a singularity that strongly depends on the parity of N. For odd N, the d.o.s. is proportional to 1/(E (\ln |E|)^3), with and without time-reversal symmetry. For even N, the d.o.s. is proportional to \ln |E| in the presence of time-reversal symmetry, while there is a pseudogap, d.o.s. proportional to E \ln |E|, in the absence of time-reversal symmetry.
Keywords
Cite
@article{arxiv.cond-mat/9904200,
title = {Density of states in coupled chains with off-diagonal disorder},
author = {P. W. Brouwer and C. Mudry and A. Furusaki},
journal= {arXiv preprint arXiv:cond-mat/9904200},
year = {2009}
}
Comments
4 pages, RevTeX; 3 figures included with epsf