Abstract
We report the occurrence of potentials in the absence of applied currents up to several volts between 1-mm-spaced probes in the normal state of films when illuminated by a laser with intensities up to ∼30 mJ/. For intensities ≤2 mJ/ these potentials disappear in the superconducting state but return, time delayed, at higher intensities. The mechanism is unknown, and the results are in contradiction to expectations based on symmetry arguments.
- Received 26 January 1990
DOI:https://doi.org/10.1103/PhysRevB.41.11564
©1990 American Physical Society