Electric Pulse Induced Resistive Switching, Electronic Phase Separation, and Possible Superconductivity in a Mott insulator - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Advanced Materials Année : 2008

Electric Pulse Induced Resistive Switching, Electronic Phase Separation, and Possible Superconductivity in a Mott insulator

Résumé

Metal-insulator transitions (MIT) belong to a class of fascinating physical phenomena, which includes superconductivity, and colossal magnetoresistance (CMR), that are associated with drastic modifications of electrical resistance. In transition metal compounds, MIT are often related to the presence of strong electronic correlations that drive the system into a Mott insulator state. In these systems the MIT is usually tuned by electron doping or by applying an external pressure. However, it was noted recently that a Mott insulator should also be sensitive to other external perturbations such as an electric field. We report here the first experimental evidence of a non-volatile electric-pulse-induced insulator-to-metal transition and possible superconductivity in the Mott insulator GaTa4Se8. Our Scanning Tunneling Microscopy experiments show that this unconventional response of the system to short electric pulses arises from a nanometer scale Electronic Phase Separation (EPS) generated in the bulk material.
Fichier principal
Vignette du fichier
Advanced-Materials_cond-mat_v3.pdf (872.25 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00414696 , version 1 (09-09-2009)

Identifiants

Citer

C. Vaju, Laurent Cario, Benoît Corraze, Etienne Janod, Vincent Dubost, et al.. Electric Pulse Induced Resistive Switching, Electronic Phase Separation, and Possible Superconductivity in a Mott insulator. Advanced Materials, 2008, 20, pp.2760-2765. ⟨10.1002/adma.200702967⟩. ⟨hal-00414696⟩
415 Consultations
158 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More