Weak localization coexisting with a magnetic field in a normal-metal–superconductor microbridge
- 1 August 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 52 (6) , R3868-R3871
- https://doi.org/10.1103/physrevb.52.r3868
Abstract
A random-matrix theory is presented which shows that breaking time-reversal symmetry by itself does 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.Keywords
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