Lifetime of Two-Dimensional Electrons Measured by Tunneling Spectroscopy

Abstract

For electrons tunneling between parallel two-dimensional electron systems, conservation of in-plane momentum produces sharply resonant current-voltage characteristics and provides a uniquely sensitive probe of the underlying electronic spectral functions. We report here the application of this technique to accurate measurements of the temperature dependence of the electron-electron scattering rate in clean two-dimensional systems. Our results are in qualitative agreement with existing calculations.

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• Coulomb Drag as a Probe of Coupled Plasmon Modes in Parallel Quantum Wells

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