Conductance oscillations with magnetic field of a two-dimensional electron gas–superconductor junction
N. M. Chtchelkatchev, I. S. Burmistrov
DOI 10.1103/PhysRevB.75.214510 · Physical Review B
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Abstract
We develop a theory for the current-voltage characteristics of a two-dimensional electron gas–superconductor interface in magnetic field at arbitrary temperatures and in the presence of surface roughness. Our theory predicts that, in the case of disordered interface, the higher harmonics of the conductance oscillations with the filling factor are strongly suppressed as compared with the first one; it should be contrasted with the case of the ideal interface for which amplitudes of all harmonics involved are of the same order. Our findings are in qualitative agreement with recent experimental data.
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