Stroboscopic Tests for Thermalization of Electrons in Pump-Probe Experiments

Matveev, O. P.; Shvaika, A. M.; Devereaux, T. P.; Freericks, J. K.

doi:10.1103/physrevlett.122.247402

Title: Stroboscopic Tests for Thermalization of Electrons in Pump-Probe Experiments

Journal Article · 18 June 2019 · Physical Review Letters

DOI: https://doi.org/10.1103/physrevlett.122.247402 · OSTI ID:1546740

Matveev, O. P. ^[1]; Shvaika, A. M. ^[2]; Devereaux, T. P. ^[3]; Freericks, J. K. ^[4]

Inst. for Condensed Matter Physics of the National Academy of Sciences of Ukraine, Lviv (Ukraine); Georgetown Univ., Washington, DC (United States). Dept. of Physics
Inst. for Condensed Matter Physics of the National Academy of Sciences of Ukraine, Lviv (Ukraine)
Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
Georgetown Univ., Washington, DC (United States). Dept. of Physics

One of the goals of pump-probe spectroscopies is to determine how electrons relax after they have been driven out of equilibrium. It is challenging to determine how close electrons are to a thermal state solely by fitting their distribution to a Fermi-Dirac distribution. Here, instead, we propose that one compare the effective temperatures of both fermions and collective bosonic modes (derived from the fermions) to determine the distance from a thermal state. Measurements of effective fermionic and bosonic temperatures can be achieved directly via photoemission and nonresonant Raman scattering. Their difference quantifies the distance from thermal equilibrium.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-76SF00515; FG02-08ER46542; AC02-05CH11231

OSTI ID:: 1546740

Alternate ID(s):: OSTI ID: 1546414

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 122; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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