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 abruptl
Induced superconductivity in InAs quantum wells with superconducting contacts
โ Scribed by Herbert Kroemer; Mason Thomas
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 160 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0749-6036
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
Current transport through InAs A1Sb quantum wells contacted with superconducting Nb electrodes shows strong evidence for the presence of multiple Andreev reflections (AR's). The efficiency of the multiple AR process is greatly enhanced by the specular normal reflection of electrons at the backplane
Amplitude of the Coulomb blockade oscillations is calculated for a single-mode Josephson junction with large electron transparency D. It is shown that the Coulomb blockade is suppressed as D + 1. The suppression is described quantitatively in terms of the Landau-Zener transition in imaginary time.
The dc Josephson effect in a superconducting quantum point contact, where supercurrent flows through a small number of channels, is reviewed. The central role of Andreev levels is emphasized which carry the whole supercurrent in short symmetric Josephson junctions including tunnel junctions. A simpl