Dielectric breakdown of Mott insulators in dynamical mean-field theory

Details Dielectric breakdown of Mott insulators in dynamical mean-field theory Dielectric breakdown of Mott insulators in dynamical mean-field theory

2010-06-17

arxiv.org/abs/1006.3516v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

Using nonequilibrium dynamical mean-field theory, we compute the time evolution of the current in a Mott insulator after a strong electric field is turned on. We observe the formation of a quasistationary state in which the current is almost time-independent although the system is constantly excited. At moderately strong fields this state is stable for quite long times. The stationary current exhibits a threshold behavior as a function of the field, in which the threshold increases with the Coulomb interaction and vanishes as the metal-insulator transition is approached.

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