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arXiv · 0804.4049

The effect of screening long-range Coulomb interactions on the metallic behavior in two-dimensional hole systems

L. H. Ho·W. R. Clarke·A. P. Micolich·R. Danneau·O. Klochan·M. Y. Simmons·A. R. Hamilton·M. Pepper·D. A. Ritchie
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Abstract

We have developed a technique utilizing a double quantum well heterostructure that allows us to study the effect of a nearby ground-plane on the metallic behavior in a GaAs two-dimensional hole system (2DHS) in a single sample and measurement cool-down, thereby maintaining a constant disorder potential. In contrast to recent measurements of the effect of ground-plane screening of the long-range Coulomb interaction in the insulating regime, we find surprisingly little effect on the metallic behavior when we change the distance between the 2DHS and the nearby ground-plane.

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L. H. Ho, W. R. Clarke, A. P. Micolich, R. Danneau, O. Klochan, M. Y. Simmons, A. R. Hamilton, M. Pepper, D. A. Ritchie. 2008-04-25. The effect of screening long-range Coulomb interactions on the metallic behavior in two-dimensional hole systems. https://doi.org/10.1103/physrevb.77.201402

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