Distinct Length Scales in the VO2 Metal–Insulator Transition Revealed by Bi-chromatic Optical Probing

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Abstract

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Upon a heating-induced metal–instulator transition (MIT) in VO2, microscopic metallic VO2 puddles nucleate and coarsen within the insulating matrix. This coexistence of the two phases across the transition spans distinct length scales as their relative domain sizes change. Far-field optical probing is applied to follow the dynamic evolution of the highly correlated metallic domains as the MIT progresses.

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