TUNNELING BETWEEN PARALLEL 2-DIMENSIONAL ELECTRON LIQUIDS

We derive and evaluate expression for the DC tunneling conductance bet ween interacting two-dimensional electron systems at non-zero temperat ures. The possibility of using the dependence of the tunneling conduct ance on voltage and temperature to determine the temperature-dependent electron-electron scattering rate at the Fermi energy is discussed. T he finite electronic life-time produced by electron-electron interacti ons is calculated as a function of temperature for quasiparticles near the Fermi circle. Our results are in excellent agreement with existin g experiments.