Threshold for superconductivity in ultrathin amorphous gallium films
- 1 October 1986
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 34 (7) , 4920-4923
- https://doi.org/10.1103/physrevb.34.4920
Abstract
Systematic studies of the onset of superconductivity in ultrathin amorphous Ga films have revealed the existence of a threshold dependent only on the normal-state sheet resistance. Global superconductivity, or zero resistance, develops only when the normal-state sheet resistance falls below 6000 Ω/□. This result agrees with previous observations on crystalline Sn films and further supports the notion of a universal resistance threshold.Keywords
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