Abstract
We consider an interaction-driven scenario for the two-dimensional metal–insulator transition in zero magnetic field (2D-MIT), based on melting the Wigner crystal through vacancy–interstitial pair formation. We show that the transition from the Wigner–Mott insulator to a heavy Fermi liquid emerges as an instability to self-doping, resembling conceptually the solid to normal liquid transition in He3. The resulting physical picture naturally explains many puzzling features of the 2D-MIT.
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