Decay of Bloch oscillations in the charge-density-wave ordered phase of an all electronic charge density wave state

ORAL

Abstract

The charge-density-wave phase of the Falicov-Kimball model displays a number of anomalous behavior 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. Using the Kadanoff-Baym-Keldysh formalism, we employ nonequilibrium dynamical mean-field theory to exactly solve for this nonlinear response. We examine both the current and the order parameter of the conduction electrons as the ordered system is driven by a dc electric field.

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Authors

  • Oleg Matveev

    Department of Physics, Georgetown University, Washington, DC

  • Andrij Shvaika

    Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, Lviv, Ukraine

  • Tom Devereaux

    SIMES, SLAC National Accelerator Laboratory and Stanford University, Stanford Institute for Materials and Energy Sciences, SLAC & Stanford University, SIMES SLAC National Accelerator Laboratory, Stanford Institute of Materials and Energy Sciences, SLAC, Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA, USA, Stanford University

  • James Freericks

    Department of Physics, Georgetown University, Washington, DC