cond - mat / 9504057 13 Apr 1995
نویسنده
چکیده
The diagrammatic linear response formalism for the Coulomb drag in two{layer systems is developed. This technique can be used to treat both elastic disorder and intralayer interaction eeects. In the absence of intralayer electron{electron correlations we reproduce earlier results, obtained using the kinetic equation and the memory{function formalism. In addition we calculate weak{localization corrections to the drag coeecient and the Hall drag coeecient in a perpendicular magnetic eld. As an example of the intralayer interaction eeects we consider a situation where one (or both) layers are close to (but above) the superconducting transition temperature. Fluctuation corrections , analogous to the Aslamazov{Larkin corrections, to the drag coee-cient are calculated. Although the uctuation corrections do not enhance the drag coeecient for normal{superconductor systems, a dramatic enhancement is found for superconductor{superconductor structures.
منابع مشابه
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