Tunneling Between Parallel Two-Dimensional Electron Gases
Abstract
The tunneling between two parallel two-dimensional electron gases has been investigated as a function of temperature , carrier density , and the applied perpendicular magnetic field . In zero magnetic field the equilibrium resonant lineshape is Lorentzian, reflecting the Lorentzian form of the spectral functions within each layer. From the width of the tunneling resonance the lifetime of the electrons within a 2DEG has been measured as a function of and , giving information about the density dependence of the electron-impurity scattering and the temperature dependence of the electron-electron scattering. In a magnetic field there is a general suppression of equilibrium tunneling for fields above T. A gap in the tunneling density of states has been measured over a wide range of magnetic fields and filling factors, and various theoretical predictions have been examined. In a strong magnetic field, when there is only one partially filled Landau level in each layer, the temperature dependence of the conductance characteristics has been modeled with a double-Gaussian spectral density.
Cite
@article{arxiv.cond-mat/9609067,
title = {Tunneling Between Parallel Two-Dimensional Electron Gases},
author = {N. Turner and J. T. Nicholls and E. H. Linfield and K. M. Brown and G. A. C. Jones and D. A. Ritchie},
journal= {arXiv preprint arXiv:cond-mat/9609067},
year = {2009}
}
Comments
LaTeX requires REVTeX macros. Eighteen pages. Fourteen postscript figures are included. (All figures have been bitmapped to save space. The original can be requested by email from [email protected]). Accepted for publication in Phys. Rev. B