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Relaxation of high-energy quasiparticle distributions: electron-electron scattering in a two-dimensional electron gas

R. N. Gurzhi·A. I. Kopeliovich·A. N. Kalinenko·A. V. Yanovsky·E. N. Bogachek·Uzi Landman·H. Buhmann·L. W. Molenkamp
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Abstract

A theory is developed for the evolution of the non-equilibrium distribution of quasiparticles when the scattering rate decreases due to particle collisions. We propose a "modified one-collision approximation" which is most effective for high-energy quasiparticle distributions. This method is used to explain novel measurements of the non-monotonic energy dependence of the signal of scattered electrons in a 2D system. The observed effect is related to a crossover from the ballistic to the hydrodynamic regime of electron flow.

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R. N. Gurzhi, A. I. Kopeliovich, A. N. Kalinenko, A. V. Yanovsky, E. N. Bogachek, Uzi Landman, H. Buhmann, L. W. Molenkamp. 2003-09-26. Relaxation of high-energy quasiparticle distributions: electron-electron scattering in a two-dimensional electron gas. https://doi.org/10.1103/physrevb.68.165318

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