Abstract
Features of Andreev reflection at the normal metal-superconductor interface in the presence of repulsive-interaction-induced pairing with a large total momentum K have been analyzed. When the direction of the motion of a hole arising upon the formation of a pair with K ≠ 0 by an incident electron corresponds to transmission, the intensity of Andreev reflection decreases compared to the case K = 0. Another cause of the decrease in the intensity is that, owing to the repulsive interaction, the superconducting order parameter has a zero line, and the quasiparticle energy minimum, which determines the turning point, does not coincide with the Fermi contour on which the quasiparticle charge changes its sign (charge asymmetry).
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Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 82, No. 9, 2005, pp. 652–656.
Original Russian Text Copyright © 2005 by Kopaev, Sofronov.
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Kopaev, Y.V., Sofronov, V.M. Manifestation of the superconducting pairing of repulsive particles with a large total momentum in Andreev reflection. Jetp Lett. 82, 575–579 (2005). https://doi.org/10.1134/1.2161284
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DOI: https://doi.org/10.1134/1.2161284