Nonequilibrium response of an electronmediated charge density wave ordered material to a large dc electric field
Abstract
Using the KadanoffBaymKeldysh formalism, we employ nonequilibrium dynamical meanfield theory to exactly solve for the nonlinear response of an electronmediated chargedensitywaveordered material. We examine both the dc current and the order parameter of the conduction electrons as the ordered system is driven by the electric field. Although the formalism we develop applies to all models, for concreteness, we examine the chargedensitywave phase of the FalicovKimball model, which displays a number of anomalous behaviors including the appearance of subgap density of states as the temperature increases. These subgap states should have a significant impact on transport properties, particularly the nonlinear response of the system to a large dc electric field.
 Publication:

Physical Review B
 Pub Date:
 January 2016
 DOI:
 10.1103/PhysRevB.93.045110
 arXiv:
 arXiv:1511.01595
 Bibcode:
 2016PhRvB..93d5110M
 Keywords:

 Condensed Matter  Strongly Correlated Electrons;
 Condensed Matter  Materials Science
 EPrint:
 10 pages, 8 figures