Coulomb drag in double layer electron systems at even denominator filling factors

Abstract

An interacting double layer system, with uniform positive background, is studied at finite temperature in the presense of a strong magnetic field corresponding to half filling in each layer. By mapping this system to composite fermions in zero field, we investigate the momentum transfer rate between the layers. As a result of the residual gauge interactions, it turns out that the low temperature dependence of this rate is $T^{4/3}$ which is enhanced as compared to the normal $T^2$ behavior.