Electron-electron interactions in a weakly screened two-dimensional electron system

Details Electron-electron interactions in a weakly screened two-dimensional electron system Electron-electron interactions in a weakly screened two-dimensional electron system

2002-04-30

arxiv.org/abs/cond-mat/0205001v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures

Scientific paper

We probe the strength of electron-electron interactions using magnetoconductivity measurements of two-dimensional non-degenerate electrons on liquid helium at 1.22 K. Our data extend to electron densities that are two orders of magnitude smaller than previously reported. We span both the independent-electron regime where the data are qualitatively described by the self-consistent Born approximation (SCBA), and the strongly-interacting electron regime. At finite fields we observe a crossover from SCBA to Drude theory as a function of electron density.

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