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Camjayi, A., Acha, C., Weht, R., Rodriguez, M. G., Corraze, B., Janod, E., Cario, L. & Rozenberg, M. J. (2014) First-Order Insulator-to-Metal Mott Transition in the Paramagnetic 3D System GaTa4Se8. Phys. Rev. Lett. 113 086404.
Added by: Laurent Cournède (2016-03-10 21:01:55) |
| Type de référence: Article DOI: 10.1103/PhysRevLett.113.086404 Numéro d'identification (ISBN etc.): 0031-9007 Clé BibTeX: Camjayi2014 Voir tous les détails bibliographiques  |
Catégories: PMN Mots-clés: crystal, electronic-structure, energy, gav4s8, localized wannier functions, mean-field theory, Molybdenum, superconductivity, tetrahedral cluster, v2o3 Créateurs: Acha, Camjayi, Cario, Corraze, Janod, Rodriguez, Rozenberg, Weht Collection: Phys. Rev. Lett. |
Consultations : 1/529
Indice de consultation : 4% Indice de popularité : 1% |
| Résumé |
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The nature of the Mott transition in the absence of any symmetry breaking remains a matter of debate. We study the correlation-driven insulator-to-metal transition in the prototypical 3D Mott system GaTa4Se8, as a function of temperature and applied pressure. We report novel experiments on single crystals, which demonstrate that the transition is of first order and follows from the coexistence of two states, one insulating and one metallic, that we toggle with a small bias current. We provide support for our findings by contrasting the experimental data with calculations that combine local density approximation with dynamical mean-field theory, which are in very good agreement.
Added by: Laurent Cournède |