Nonequilibrium response of an electron mediated charge-density-wave-ordered material to a large dc electric field

Abstract

Using the Kadanoff-Baym-Keldysh formalism, we employ nonequilibrium dynamical mean-field theory to exactly solve for the nonlinear response of an electron-mediated charge-density-wave-ordered 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 charge-density-wave phase of the Falicov-Kimball 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.

10 pages, 8 figures

References in corpus (6)

• Nonequilibrium dynamical mean-field theory and its applications
• Quenching Bloch oscillations in a strongly correlated material
• Nonequilibrium "melting" of a charge density wave insulator via an ultrafast laser pulse
• Optical and dc transport properties of a strongly correlated charge density wave system: exact solution in the ordered phase of the spinless Falicov-Kimball model with dynamical mean-field theory
• Exact solution for Bloch oscillations of a simple charge-density-wave insulator
• Nonequilibrium dynamical mean-field theory for the charge-density-wave phase of the Falicov-Kimball model

Cited by in corpus (3)

• Time-domain pumping a quantum-critical charge-density-wave-ordered material
• Theoretical description of pump/probe experiments in electron mediated charge-density-wave insulators
• Real-time evolution of static electron-phonon models in time-dependent electric fields