Time-resolved photoemission of correlated electrons driven out of equilibrium

Journal Article · Thu Apr 15 00:00:00 EDT 2010 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.81.165112· OSTI ID:21366732

Moritz, B ^[1]; Devereaux, T P ^[1]; Freericks, J K ^[2]

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1. Stanford Institute for Materials and Energy Science (SIMES), SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States)
2. Department of Physics, Georgetown University, Washington, DC 20057 (United States)

We describe the temporal evolution of the time-resolved photoemission response of the spinless Falicov-Kimball model driven out of equilibrium by strong applied fields. The model is one of the few possessing a metal-insulator transition and admitting an exact solution in the time domain. The nonequilibrium dynamics, evaluated using an extension of dynamical mean-field theory, show how the driven system differs from two common viewpoints--a quasiequilibrium system at an elevated effective temperature (the 'hot' electron model) or a rapid interaction quench ('melting' of the Mott gap) - due to the rearrangement of electronic states and redistribution of spectral weight. The results demonstrate the inherent trade-off between energy and time resolution accompanying the finite width probe pulses, characteristic of those employed in pump-probe time-domain experiments, which can be used to focus attention on different aspects of the dynamics near the transition.

• OSTI ID: 21366732
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 81, Issue 16; Other Information: DOI: 10.1103/PhysRevB.81.165112; (c) 2010 The American Physical Society; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRON CORRELATION
ELECTRONS
EQUILIBRIUM
EXACT SOLUTIONS
INTERACTIONS
MEAN-FIELD THEORY
MELTING
METALS
PHOTOEMISSION
SIMULATION
TIME RESOLUTION
CORRELATIONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
FERMIONS
LEPTONS
MATHEMATICAL SOLUTIONS
PHASE TRANSFORMATIONS
RESOLUTION
SECONDARY EMISSION
TIMING PROPERTIES