Hui, V. C. and Lambert, Colin (1993) Superconductivity-induced conductance suppression in mesoscopic solids. Journal of Physics Condensed Matter, 5 (50). L651-L662. ISSN 0953-8984
Full text not available from this repository.Abstract
We examine the change deltaG in the two-probe electrical conductance G of a mesoscopic sample due to the switching on of superconductivity and prove that when conductance of the normal mesoscopic host is sufficiently high, the onset of superconductivity always produces a decrease in G. If the superconducting order parameter is of magnitude DELTA, we focus attention on the susceptibility chiDELTA = lim(DELTA-->0) partial derivative G(DELTA)/partial derivative (DELTA2). For weakly disordered, (i.e. ballistic) normal hosts, the average value of this quantity is negative. For diffusive hosts, the mean of chiDELTA increases linearly with [N - G(0)], where N is the number of open channels in the external, current carrying probes, while the fluctuations about the mean are found to be independent of G(0). With increasing normal disorder, chiDELTA undergoes a transition to a region of large fluctuations, before approaching a strongly localized regime, where typical values of chiDELTA are of order [ln2G(0)]-1.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | Journal of Physics Condensed Matter |
| Subjects: | Q Science > QC Physics |
| Departments: | Faculty of Science and Technology > Physics |
| ID Code: | 58131 |
| Deposited By: | ep_importer_pure |
| Deposited On: | 24 Oct 2012 13:55 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 24 Oct 2012 13:55 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/58131 |
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