Slowdown of the Electronic Relaxation Close to the Mott Transition.
We investigate the time-dependent reformation of the quasiparticle peak in a correlated metal near the Mott transition, after the system is quenched into a hot electron state and equilibrates with an environment which is colder than the Fermi-liquid crossover temperature. Close to the transition, we identify a purely electronic bottleneck time scale, which depends on the spectral weight around the Fermi energy in the bad metallic phase in a nonlinear way. This time scale can be orders of magnitude larger than the bare and renormalized electronic hopping time, so that a separation of electronic and lattice time scales may break down. The results are obtained using nonequilibrium dynamical mean-field theory and a slave-rotor representation of the Anderson impurity model.
Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany and University of Hamburg-CFEL, 22761 Hamburg, Germany.
Sharareh
S
Sayyad
Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany and University of Hamburg-CFEL, 22761 Hamburg, Germany.
Martin
M
Eckstein