Abstract
We have investigated the electrical transport in mesoscopic low-density 2D electronsystems as a function of background disorder. At zero magnetic field, over a specificwindow of disorder and electron density, an unusual density-dependent oscillatorypattern in conductance was observed as the Fermi energy was swept in the localizedregime. The temperature, source–drain bias and magnetic field dependence oftransport indicate the formation of a pinned electron solid, which undergoes aseries of order–disorder transitions as the electron density is changed by a gate.
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