Sound Velocity Anomaly at the Mott Transition: application to organic conductors and V2O3. - Archive ouverte HAL
Pré-Publication, Document De Travail Année : 2004

Sound Velocity Anomaly at the Mott Transition: application to organic conductors and V2O3.

Résumé

Close to the Mott transition, lattice degrees of freedom react to the softening of electron degrees of freedom. This results in a change of lattice spacing, a diverging compressibility and a critical anomaly of the sound velocity. These effects are investigated within a simple model, in the framework of dynamical mean-field theory. The results compare favorably to recent experiments on the layered organic \kappa-(BEDT-TTF)_2Cu[N(CN)_2]Cl conductor . We predict that effects of a similar magnitude are expected for V2O3, despite the much larger value of the elastic modulus of this material.
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Dates et versions

hal-00001567 , version 1 (16-05-2004)
hal-00001567 , version 2 (11-10-2004)

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S.R. Hassan, A. Georges, H.R. Krishnamurthy. Sound Velocity Anomaly at the Mott Transition: application to organic conductors and V2O3.. 2004. ⟨hal-00001567v2⟩
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