Temperature dependence of the electronic coherence of GaAs-GaAlAs superlattices
- 18 June 1990
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 56 (25) , 2545-2547
- https://doi.org/10.1063/1.102882
Abstract
We have shown that the coherence length of electrons in a 55‐Å‐period GaAs‐GaAlAs superlattice does not depend strongly on temperature in the range 5–292 K, varying from 17 periods at 5 K to a minimum of nine periods at room temperature. The quantum coherence was determined by photocurrent spectroscopy experiments that exploit the formation of Stark ladders in superlattices under electric fields.Keywords
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