Electric Pulse Induced Resistive Switching, Electronic Phase Separation, and Possible Superconductivity in a Mott insulator - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




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Abstract: Metal-insulator transitions MIT belong to a class of fascinating physicalphenomena, which includes superconductivity, and colossal magnetoresistanceCMR, that are associated with drastic modifications of electrical resistance.In transition metal compounds, MIT are often related to the presence of strongelectronic correlations that drive the system into a Mott insulator state. Inthese systems the MIT is usually tuned by electron doping or by applying anexternal pressure. However, it was noted recently that a Mott insulator shouldalso be sensitive to other external perturbations such as an electric field. Wereport here the first experimental evidence of a non-volatileelectric-pulse-induced insulator-to-metal transition and possiblesuperconductivity in the Mott insulator GaTa4Se8. Our Scanning TunnelingMicroscopy experiments show that this unconventional response of the system toshort electric pulses arises from a nanometer scale Electronic Phase SeparationEPS generated in the bulk material.



Author: C. Vaju, L. Cario, B. Corraze, E. Janod, V. Dubost, T. Cren, D. Roditchev, D. Braithwaite, O. Chauvet

Source: https://arxiv.org/







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