Two dimensional electron gas driven by strong alternating electric field

Details Two dimensional electron gas driven by strong alternating electric field Two dimensional electron gas driven by strong alternating electric field

2004-08-23

arxiv.org/abs/cond-mat/0408494v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 1 figure REVTEX

Scientific paper

2D Fermi liquid driven by uniform alternating electric field at zero temperature may remain in quantum coherent non-equilibrium state. We develop a quasistatic approximation for strong and slow ac-fields and solve the problem of driven disordered 2D electron gas in high non-overlapping Landau levels. The broadening of Landau level has the Lorentz form and is inversely proportional to the amplitude of the ac-field. In the absence of electron-phonon interaction the electron distribution function is constant within the last Landau level and the diagonal dc-conductivity is zero. For weak electron-phonon interaction the dc-conductivity is anisotropic. A kinetic transition from the phonon cooling to the phonon heating is predicted.

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