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Applied Physics Letters
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Temperature dependence of the electronic coherence of GaAs-GaAlAs superlattices

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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.

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Applied Physics Letters

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