Three signatures of phase-coherent Andreev reflection | Zendy

I. K. Marmorkos | Zendy; C. W. J. Beenakker | Zendy; Rodolfo A. Jalabert | Zendy

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Three signatures of phase-coherent Andreev reflection

Author(s) -

I. K. Marmorkos,

C. W. J. Beenakker,

Rodolfo A. Jalabert

Publication year - 1993

Publication title -

physical review. b, condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1095-3795

pISSN - 0163-1829

DOI - 10.1103/physrevb.48.2811

Subject(s) - andreev reflection , physics , conductance , condensed matter physics , superconductivity , quantum tunnelling , phase (matter) , weak localization , resistive touchscreen , t symmetry , magnetic field , quantum mechanics , magnetoresistance , engineering , electrical engineering

An efficient numerical scheme is developed to compute the differential conductance [ital G][sub NS] of a disordered normal-metal--superconductor (NS) junction at voltages [ital V] and magnetic fields [ital B]. A sharp [ital peak] is found in [ital G][sub NS] around [ital V],[ital 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 [ital dip], due to an enhanced weak-localization effect. Finally, it is demonstrared that time-reversal-symmetry breaking does [ital not] reduce the universal conductance fluctuations'' in [ital G][sub NS] by a factor of 2.

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