title: Sound velocity anomaly at the mott transition: application to organic conductors and V2O3.
abstract: 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-conductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl. We predict that effects of a similar magnitude are expected for V(2)O(3), despite the much larger value of the elastic modulus of this material.
authors.affiliation: Laboratoire de Physique Théorique-Ecole Normale Superieure 24,rue Lhomond 75231 Paris Cedex 05, France.
authors.forename: S R
authors.initials: SR
authors.lastname: Hassan
authors.forename: A
authors.initials: A
authors.lastname: Georges
authors.forename: H R
authors.initials: HR
authors.lastname: Krishnamurthy