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

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

2004-05-17

arxiv.org/abs/cond-mat/0405359v2

Physics

Condensed Matter

Strongly Correlated Electrons

New discussion of the relation between the sound-velocity and the compressibility has been added

Scientific paper

10.1103/PhysRevLett.94.036402

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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