Abstract
An excess low-voltage conductance is observed in Nb-InGaAs contacts at low temperatures and interpreted as being due to a pair current across the superconductor-semiconductor interface. This is the first observation of a pair current, a nonequilibrium manifestation of the proximity effect, in junctions having one electrode which is not a superconductor. A model is presented which accounts for the observed behavior. In addition to the pair current, it is demonstrated that these junctions exhibit excess conductance due to Andreev scattering.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 3026-3029 |
| Number of pages | 4 |
| Journal | Physical review letters |
| Volume | 67 |
| Issue number | 21 |
| DOIs | |
| State | Published - 1991 |
| Externally published | Yes |
ASJC Scopus subject areas
- General Physics and Astronomy
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