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Localisation of excitations by particle-hole scattering in inhomogeneous superconductors

Lambert, Colin and Hui, V. C. (1990) Localisation of excitations by particle-hole scattering in inhomogeneous superconductors. Physica B: Condensed Matter, 165-16 (2). pp. 1107-1108. ISSN 0921-4526

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Abstract

We demonstrate that the quasi-particle excitations of a two dimensional inhomogeneous superconductor may be localised by spatial fluctuations in the order parameter Δ (r). Two models of disorder are introduced. In the first, the magnitude of Δ (r) varies randomly, but the phase is constant. In the second, the phase varies randomly with position, but the magnitude of Δ (r) is constant. A finite size scaling technique is used to compute the inverse localisation length of long strips of finite width. The results suggest that for a two dimensional superconductor, fluctuations in |Δ(r)| can localise excitations, while fluctuations in the phase alone cannot.

Item Type: Article
Journal or Publication Title: Physica B: Condensed Matter
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 58120
Deposited By: ep_importer_pure
Deposited On: 24 Oct 2012 10:17
Refereed?: Yes
Published?: Published
Last Modified: 10 Apr 2014 00:08
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/58120

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