Three signatures of phase-coherent Andreev reflection
I. K. Marmorkos, C. W. J. Beenakker, R. A. Jalabert
DOI 10.1103/PhysRevB.48.2811 · Physical Review B
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Abstract
An efficient numerical scheme is developed to compute the differential conductance GNS of a disordered normal-metal–superconductor (NS) junction at voltages V and magnetic fields B. A sharp peak is found in GNS around V,B=0 in the case of a resistive NS interface, as observed experimentally and confirming the theory of ‘‘reflectionless tunneling.’’ An ideal interface shows a conductance dip, due to an enhanced weak-localization effect. Finally, it is demonstrared that time-reversal-symmetry breaking does not reduce the ‘‘universal conductance fluctuations’’ in GNS by a factor of 2.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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