Experimental Evidence of Delocalized States in Random Dimer Superlattices
Experimental Evidence of Delocalized States in Random Dimer Superlattices
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, …