Delocalization and conductance quantization in one-dimensional systems

Details Delocalization and conductance quantization in one-dimensional systems Delocalization and conductance quantization in one-dimensional systems

2001-12-14

arxiv.org/abs/cond-mat/0112260v2

Phys. Rev. B 65, 193405 (2002)

Physics

Condensed Matter

Disordered Systems and Neural Networks

submitted to PRB

Scientific paper

10.1103/PhysRevB.65.193405

We investigate the delocalization and conductance quantization in finite one-dimensional chains with only off-diagonal disorder coupled to leads. It is shown that the appearence of delocalized states at the middle of the band under correlated disorder is strongly dependent upon the even-odd parity of the number of sites in the system. In samples with inversion symmetry the conductance equals $2e^{2}/h$ for odd samples, and is smaller for even parity. This result suggests that this even-odd behaviour found previously in the presence of electron correlations may be unrelated to charging effects in the sample.

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