Abstract
Switching voltage of first-order metal–insulator transition (MIT) in VO 2, an inhomogeneous strongly correlated system, is changed by irradiating an infrared light with λ=1.5 μm and applying the electric field (photo-induced switching). This was predicted in the hole-driven MIT theory in which hole doping of a low concentration below 0.01% into conduction band (Fermi surface) induces the abrupt MIT as correlation effect. The switching is explained by the Mott transition not the Peierls transition.
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