2000 Volume 69 Issue 10 Pages 3174-3177
Microscopic processes giving the energy gain and loss of a two-dimensional electron system in long-range potential fluctuations are studied theoretically at the breakdown of the quantum Hall effect in the case of even-integer filling factors. The Coulomb scattering within a broadened Landau level is proposed to give the gain, while the phonon scattering to give the loss. The energy balance equation shows that the electron temperature Te and the diagonal conductivity σxx exhibit a bistability above the lower critical electric field Ec1. Calculated values of Ec1 as well as Te and σxx at Ec1 are in agreement with the observed values in their orders of magnitude.
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