Nonlinear response of Bloch electrons in infinite dimensions

Details Nonlinear response of Bloch electrons in infinite dimensions Nonlinear response of Bloch electrons in infinite dimensions

2004-08-20

arxiv.org/abs/cond-mat/0408455v1

Phys. Rev. B 71, 085104--1-11 (2005)

Physics

Condensed Matter

Statistical Mechanics

11 pages 6 figures

Scientific paper

10.1103/PhysRevB.71.085104

The exact nonlinear response of noninteracting (Bloch) electrons is examined within a nonequilibrium formalism on the infinite-dimensional hypercubic lattice. We examine the effects of a spatially uniform, but time-varying electric field (ignoring magnetic-field effects). The electronic Green's functions, Wigner density of states, and time-varying current are all determined and analyzed. We study both constant and pulsed electric fields, focusing on the transient response region. These noninteracting Green's functions are an important input into nonequilibrium dynamical mean field theory for the nonlinear response of strongly correlated electrons.

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