SteadyState Nonequilibrium Density of States of Driven Strongly Correlated Lattice Models in Infinite Dimensions
Abstract
An exact formalism for calculating the retarded and advanced Green’s functions of strongly correlated lattice models in a uniform electric field is derived within dynamical meanfield theory. To illustrate the method, we solve for the nonequilibrium density of states of the Hubbard model in both the metallic and Mottinsulating phases at halffilling (with an arbitrary strength electric field) by employing the approximate numerical renormalization group as the impurity solver. This general approach can be applied to any strongly correlated lattice model in the limit of large dimensions.
 Publication:

Physical Review Letters
 Pub Date:
 November 2008
 DOI:
 10.1103/PhysRevLett.101.196401
 arXiv:
 arXiv:0804.3077
 Bibcode:
 2008PhRvL.101s6401J
 Keywords:

 71.27.+a;
 71.10.Fd;
 71.45.Gm;
 72.20.Ht;
 Strongly correlated electron systems;
 heavy fermions;
 Lattice fermion models;
 Exchange correlation dielectric and magnetic response functions plasmons;
 Highfield and nonlinear effects;
 Condensed Matter  Strongly Correlated Electrons
 EPrint:
 (5 pages, 2 figures, RevTeX)