Experimental evidence of delocalized states in random dimer superlattices

Details Experimental evidence of delocalized states in random dimer superlattices Experimental evidence of delocalized states in random dimer superlattices

1999-02-04

arxiv.org/abs/cond-mat/9902072v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 5 figures. Physical Review Letters (in press)

Scientific paper

10.1103/PhysRevLett.82.2159

We study the electronic properties of GaAs-AlGaAs superlattices with intentional correlated disorder by means of photoluminescence and vertical dc resistance. The results are compared to those obtained in ordered and uncorrelated disordered superlattices. We report the first experimental evidence that spatial correlations inhibit localization of states in disordered low-dimensional systems, as our previous theoretical calculations suggested, in contrast to the earlier belief that all eigenstates are localized.

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