Metal–insulator transition in a low-mobility two-dimensional electron system
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چکیده
منابع مشابه
Metal-Insulator Transition in a Low-Mobility Two-Dimensional Electron System
We have varied the disorder in a two-dimensional electron system in silicon by applying substrate bias. When the disorder becomes sufficiently low, we observe the emergence of the metallic phase, and find evidence for a metal-insulator transition (MIT): the single-parameter scaling of conductivity with temperature near a critical electron density. We obtain the scaling function β, which determi...
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Large fluctuations of conductivity with time are observed in a low-mobility twodimensional electron system in silicon at low electron densities ns and temperatures. A dramatic increase of the noise power (∝ 1/fα) as ns is reduced below a certain density ng, and a sharp jump of α at ns ≈ ng, are attributed to the freezing of the electron glass at ns = ng. The data strongly suggest that glassy dy...
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ژورنال
عنوان ژورنال: Physica B: Condensed Matter
سال: 1998
ISSN: 0921-4526
DOI: 10.1016/s0921-4526(98)00295-6