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Letter
Nature Physics 4, 932–935 (1 December 2008) | doi:10.1038/nphys1106
Coulomb correlations and the Wigner|[ndash]|Mott transition
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Abstract
Strong correlation effects, such as a marked increase in the effective mass of the carriers of electricity, recently observed in the low-density electron gas have provided spectacular support for the existence of a sharp metal–insulator transition in dilute two-dimensional electron gases. Here, we show that strong correlations, normally expected only for narrow integer-filled bands, can be effectively enhanced even far away from integer-filling, owing to incipient charge ordering driven by non-local Coulomb interactions.
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