Excess currents larger than the point contact limit in normal-metal/superconducting junctions

In a point contact NS junction, perfect Andreev reflection occurs over a range of voltages equal to the superconducting energy gap, producing an excess current of Iexc= (4/3)(2 eΔ/h). If the superconductor has a finite width, rather than the infinite width of the point contact, one cannot neglect su...

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Veröffentlicht in:	Superlattices and microstructures 1999-05, Vol.25 (5-6), p.683-700
Hauptverfasser:	Riedel, Richard, Bagwell, Philip F.
Format:	Artikel
Sprache:	eng
Online-Zugang:	Volltext
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