On the 'nonuniversal' conductance of an almost ideal quantum wire

Authors
Seba, P Zyczkowski, K Zakrzewski, J
Citation
P. Seba et al., On the 'nonuniversal' conductance of an almost ideal quantum wire, ACT PHY P B, 30(9), 1999, pp. 2797-2810
Citations number
17
Categorie Soggetti
Physics
Journal title
ACTA PHYSICA POLONICA B
ISSN journal
05874254 → ACNP
Volume
30
Issue
9
Year of publication
1999
Pages
2797 - 2810
Database
ISI
SICI code
0587-4254(199909)30:9<2797:OT'COA>2.0.ZU;2-Z
Abstract
High quality quantum wires conductance measurements have revealed an unexpe cted feature: the quantization step of the conductance is apparently system dependent. We show that even a single impurity (modelled by a short range potential) in a wire leads to enhanced backscattering and affects the condu ctance steps. We construct a random matrix model which shows similar behavi our with the size of conductance step dependent on a single parameter.