Weak Localization Coexisting with a Magnetic Field in a Normal-Metal--Superconductor Microbridge
arXiv:cond-mat/9504047 · doi:10.1103/PhysRevB.52.R3868
Abstract
A random-matrix theory is presented which shows that breaking time-reversal symmetry by itself does {\em not} suppress the weak-localization correction to the conductance of a disordered metal wire attached to a superconductor. Suppression of weak localization requires applying a magnetic field as well as raising the voltage, to break both time-reversal symmetry and electron-hole degeneracy. A magnetic-field dependent contact resistance obscured this anomaly in previous numerical simulations.
8 pages, REVTeX-3.0, 1 figure
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