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Charge Transport in the Dense Two-Dimensional Coulomb Gas

Dierk Bormann
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Abstract

The dynamics of a globally neutral system of diffusing Coulomb charges in two dimensions, driven by an applied electric field, is studied in a wide temperature range around the Berezinskii-Kosterlitz-Thouless transition. I argue that the commonly accepted ``free particle drift'' mechanism of charge transport in this system is limited to relatively low particle densities. For higher densities, I propose a modified picture involving collective ``partner transfer'' between bound pairs. The new picture provides a natural explanation for recent experimental and numerical findings which deviate from standard theory. It also clarifies the origin of dynamical scaling in this context.

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Dierk Bormann. 1997-05-20. Charge Transport in the Dense Two-Dimensional Coulomb Gas. https://doi.org/10.1103/physrevlett.78.4324

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