Scaling behavior in a quantum wire with scatterers

Details Scaling behavior in a quantum wire with scatterers Scaling behavior in a quantum wire with scatterers

2000-09-25

arxiv.org/abs/cond-mat/0009381v1

Phys. Rev. B 62, 16933 (2000).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 7 figures included; to be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.62.16933

We study the conductance properties of a straight two-dimensional quantum wire with impurities modeled by $s$-like scatterers. Their presence can lead to strong inter-channel coupling. It was shown that such systems depend sensitively on the number of transverse modes included. Based on a poor man's scaling technique we include the effect of higher modes in a renormalized coupling constant. We therefore show that the low-energy behavior of the wire is dominated by only a few modes, which hence is a way to reduce the necessary computing power. The technique is successfully applied to the case of one and two $s$-like scatterers.

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