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Induced superconductivity and residual resistance in InAs quantum wells contacted with superconducting Nb electrodes

โœ Scribed by Mason Thomas; Herbert Kroemer; Hans-Richard Blank; Ki C Wong

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
110 KB
Volume
2
Category
Article
ISSN
1386-9477

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โœฆ Synopsis

We have investigated hybrid superconductor/semiconductor structures consisting of modulation-doped InAs quantum wells contacted by closely spaced niobium electrodes, and showing induced superconductivity in the InAs. The resistance of these semiconductor-coupled weak links does not disappear abruptly with decreasing temperature, but instead over a wide temperature range, in a continuous, thermally activated fashion. We present a detailed quantitative study of the temperature-dependence of the residual resistance, and of a peculiar interrelation between the rate of resistance decrease and the geometry of the devices.

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