Abstract
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 interchannel 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.
- Received 11 July 2000
DOI:https://doi.org/10.1103/PhysRevB.62.16933
©2000 American Physical Society