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Andreev and normal reflections at normal metal—Superconductor boundaries: Limitations of the semiclassical approximation (1997)

Šipr, Ondřej ; Györffy, Balázs L.

Springer

Journal of low temperature physics 106 (1997), S. 315-320

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ISSN: 1573-7357

Keywords: 74.80Fp ; 74.25Jb

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract We study the scattering of quasiparticles at a normal metal—superconductor interface using Bogoliubov-de Gennes equations, taking the motion parallel to the interface fully into account. We show that while the Andreev reflection is the dominant scattering process in case of nearly perpendicular impacts (as predicted by the semiclassical theory), the normal reflection becomes increasingly important for quasiparticles with large momenta parallel to the interface, and the semiclassical approximation becomes progressively inadequate. We work out consequence of this feature for spectra of bound states in superconductor—normal metal—superconductor junctions.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02399632

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