Shifting a quantum wire through a disordered crystal: Observation of conductance fluctuations in real space

Authors
Heinzel, T Salis, G Held, R Luscher, S Ensslin, K Wegscheider, W Bichler, M
Citation
T. Heinzel et al., Shifting a quantum wire through a disordered crystal: Observation of conductance fluctuations in real space, PHYS REV B, 61(20), 2000, pp. R13353-R13356
Citations number
30
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
61
Issue
20
Year of publication
2000
Pages
R13353 - R13356
Database
ISI
SICI code
0163-1829(20000515)61:20<R13353:SAQWTA>2.0.ZU;2-L
Abstract
A quantum wire is spatially displaced by suitable electric fields with resp ect to the scattering potentials inside a semiconductor crystal. As a funct ion of the wire position, the low-temperature conductance shows reproducibl e fluctuations. Their characteristic temperature scale is a few hundred mil likelvin, indicating a phase-coherent effect. One fluctuation is attributed to a single bump in the scattering potential entering or leaving the wire.