Abstract

We have investigated the transport properties of two-dimensional electron systems (2DES) on quench-condensed hydrogen films for various electron densities up to n e =1.5× 10 cm -2 . In the range of the plasma parameter Γ= / from 40 to 180 we have observed a behavior lnμ∞Γ of the electron mobility μ with a distinct transition from a smaller slope for Γ 125. This signature is interpreted as the Wigner crystallization of the 2DES

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