Coulomb drag in strongly coupled quantum wells: Temperature dependence of the many-body correlations

摘要： We investigate the effect of the temperature dependence of many-body correlations on hole–hole Coulomb drag in strongly coupled GaAs/GaAlAs double quantum wells. For arbitrary temperatures, we obtained the correlations using the classical-map hypernetted-chain approach. We compare the temperature dependence of the resulting drag resistivities qDeTT at different densities with qDeTT calculated assuming correlations ?xed at zero temperature. Comparing the results with those when correlations are completely neglected, we con?rm that correlations signi?cantly increase the drag. We ?nd that the drag becomes sensitive to the temperature dependence of T (cid:2) 2TF, twice the Fermi temperature. Our results show excellent agreement with available experimental data.