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Statut |
Confirmé |
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Série |
SEM-BESSON |
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Domaines |
cond-mat |
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Date |
Lundi 11 Décembre 2006 |
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Heure |
10:30 |
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Institut |
IMPMC |
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Salle |
Salle de Conferences, Bat. 15, Campus Boucicaut, 140 rue de Lourmel 75015 Paris |
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Nom de l'orateur |
Barisic |
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Prenom de l'orateur |
Neven |
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Addresse email de l'orateur |
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Institution de l'orateur |
Stanford Synchrotron Radiation Laboratory, Stanford, CA, USA |
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Titre |
High pressure study of a quasi one dimensional two band conductor |
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Résumé |
The BaVS3 family of materials is a Q1D system consisting of V-3d1 chains, which displays a unique collection of correlation-driven phenomena, including a metal-insulator transition driven by the charge-density wave and/or the spin-density wave as well as a pressure-dependent crossover between the non-Fermi-liquid and Fermi-liquid behaviors. In an attempt to understand better these and many other properties, we have undertaken a systematic experimental study of BaVS3 and related compounds. The primary measurements carried out were those of the transport properties, resistivity and thermoelectric power (TEP) as functions of temperature (from 2 to 600 K), pressure (up to 3 GPa) and magnetic field (up to 12 T). In addition to the transport measurements, the strong changes in the electrical and magnetic properties of the system around metal-to-insulator phase transition were followed by magnetic susceptibility, angle-resolved photoelectron spectroscopy (ARPES) and frequency-dependent conductivity. As a result a p-T phase diagram is suggested. Observed physical properties are interpreted in the framework of the two band model i.e. by the subtle interplay between the two sets of electrons. |
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Numéro de preprint arXiv |
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Commentaires |
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Fichiers attachés |
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