Shifting a Quantum Wire through a Disordered Crystal: Observation of Conductance Fluctuations in Real Space
Mesoscale and Nanoscale Physics
2009-10-31 v1 Disordered Systems and Neural Networks
Abstract
A quantum wire is spatially displaced by suitable electric fields with respect to the scatterers inside a semiconductor crystal. As a function of the wire position, the low-temperature resistance shows reproducible fluctuations. Their characteristic temperature scale is a few hundred millikelvin, indicating a phase-coherent effect. Each fluctuation corresponds to a single scatterer entering or leaving the wire. This way, scattering centers can be counted one by one.
Keywords
Cite
@article{arxiv.cond-mat/9909337,
title = {Shifting a Quantum Wire through a Disordered Crystal: Observation of Conductance Fluctuations in Real Space},
author = {T. Heinzel and G. Salis and R. Held and S. Luescher and K. Ensslin and W. Wegscheider and M. Bichler},
journal= {arXiv preprint arXiv:cond-mat/9909337},
year = {2009}
}
Comments
4 pages, 3 figures