%0 Journal Article
%T Tunneling Conductance Between Parallel Two Dimensional Electron Systems
%A Lian Zheng
%A A. H. MacDonald
%J Physics
%D 1992
%I arXiv
%R 10.1103/PhysRevB.47.10619
%X We derive and evaluate expressions for the low temperature {\it dc} equilibrium tunneling conductance between parallel two-dimensional electron systems. Our theory is based on a linear-response formalism and on impurity-averaged perturbation theory. The disorder broadening of features in the dependence of tunneling conductance on sheet densities and in-plane magnetic field strengths is influenced both by the finite lifetime of electrons within the wells and by non-momentum-conserving tunneling events. Disorder vertex corrections are important only for weak in-plane magnetic fields and strong interwell impurity-potential correlations. We comment on the basis of our results on the possibility of using tunneling measurements to determine the lifetime of electrons in the quantum wells.
%U http://arxiv.org/abs/cond-mat/9212016v1