Tunneling Conductance Between Parallel Two Dimensional Electron Systems
Abstract
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.
Cite
@article{arxiv.cond-mat/9212016,
title = {Tunneling Conductance Between Parallel Two Dimensional Electron Systems},
author = {Lian Zheng and A. H. MacDonald},
journal= {arXiv preprint arXiv:cond-mat/9212016},
year = {2009}
}
Comments
14 pages, 5 Fig. not included, revtex, IUcm92-005