Resumen
La transición metal-aislante (MIT) en el dióxido de vanadio (VO2) representa un sistema canónico de electrones correlacionados donde correlaciones electrónicas y distorsiones estructurales operan cooperativamente. Presentamos una metodología experimental para deconvolucionar las vías de conmutación electrónica y térmica mediante mediciones pulsadas corriente-voltaje dependientes de temperatura, minimizando efectos de auto-calentamiento. El espectro de conmutación se descompone en ramas electrónicas (débil dependencia térmica) y ramas térmicas (dependencia parabólica, calentamiento Joule). Las ramas electrónicas identificadas permiten aplicaciones en memorias neuromórficas y osciladores de alta frecuencia. Este trabajo proporciona evidencia experimental directa de la operación simultánea de ambos mecanismos, estableciendo un marco cuantitativo para transiciones de fase impulsadas por voltaje en óxidos correlacionados.
Referencias
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