Lancaster EPrints

Conductance fluctuations due to a bistable scatterer in a weakly connected conductor

Falko, Vladimir (1995) Conductance fluctuations due to a bistable scatterer in a weakly connected conductor. Physical Review B, 51 (8). pp. 5227-5232. ISSN 0163-1829

[img]
Preview
PDF (PhysRevB.51.5227) - Published Version
Download (258Kb) | Preview

    Abstract

    We study the effect of a single bistable scatterer on the conductance of mesoscopic conductors in the crossover regime between open and closed systems. After the resistance of the contact between the metallic grain and bulk electrode contacts exceeds the resistance of an individual grain, the effect of a bistability is enhanced and takes the universal form. Its efficiency scales with the cross section of the bistable impurity and conductances of contacts but is independent of this impurity position inside a sample. Mutual correlations between magnetoconductance fluctuations at two conductance levels also look universal. Enhancement of the conductance sensitivity to variations of impurity configurations in samples with highly resistive contacts transforms the spectral density of excess quantum noise toward a white noise behavior and requires higher stability of the sample in order to observe mesoscopic effects in direct-current measurements.

    Item Type: Article
    Journal or Publication Title: Physical Review B
    Additional Information: © 1995 The American Physical Society
    Subjects: Q Science > QC Physics
    Departments: Faculty of Science and Technology > Physics
    ID Code: 57079
    Deposited By: ep_importer_pure
    Deposited On: 05 Sep 2012 17:40
    Refereed?: Yes
    Published?: Published
    Last Modified: 24 Jan 2014 05:31
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/57079

    Actions (login required)

    View Item