Allsopp, N. K. and Hui, V. C. and Lambert, Colin and Robinson, S. J. (1994) Theory of the sign of multi-probe conductances for normal and superconducting materials. Journal of Physics: Condensed Matter, 6 (48). pp. 10475-10486. ISSN 0953-8984Full text not available from this repository.
We examine equivalent forms of the current-voltage relationship applicable to mesoscopic superconductors and use one of these to derive general conditions for the sign of the conductance in a four-probe measurement. For disordered systems, with well separated voltage probes, where the normal-state conductance is positive, we predict that the sign of the longitudinal four-probe conductance of superconducting wires can be reversed by varying an applied magnetic field, and that at certain critical values of the field, the conductance passes through a singularity.
|Journal or Publication Title:||Journal of Physics: Condensed Matter|
|Subjects:||Q Science > QC Physics|
|Departments:||Faculty of Science and Technology > Physics|
|Deposited On:||24 Oct 2012 15:23|
|Last Modified:||07 Jan 2015 17:52|
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