Electronic structure of warm dense copper studied by ultrafast x-ray absorption spectroscopy

Cho, B. I.; Engelhorn, K.; Correa, A. A.; Ogitsu, T.; Weber, C. P.; Lee, H. J.; Feng, J.; Ni, P. A.; Ping, Y.; Nelson, A. J.; Prendergast, D.; Lee, R. W.; Falcone, R. W.; Heimann, P. A.

doi:10.1103/PhysRevLett.106.167601

Title: Electronic structure of warm dense copper studied by ultrafast x-ray absorption spectroscopy

Journal Article · Wed Apr 20 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.106.167601· OSTI ID:1334345

Cho, B. I. ^[1]; Engelhorn, K. ^[1]; Correa, A. A. ^[2]; Ogitsu, T. ^[2]; Weber, C. P. ^[3]; Lee, H. J. ^[4]; Feng, J. ^[1]; Ni, P. A. ^[1]; Ping, Y. ^[2]; Nelson, A. J. ^[2]; Prendergast, D. ^[1]; Lee, R. W. ^[2]; Falcone, R. W. ^[5]; Heimann, P. A. ^[1]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Santa Clara Univ., Santa Clara, CA (United States)
SLAC National Accelerator Lab., Menlo Park, CA (United States). Linac Coherent Light Source (LCLS)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)

We use time-resolved x-ray absorption spectroscopy to investigate the unoccupied electronic density of states of warm dense copper that is produced isochorically through the absorption of an ultrafast optical pulse. The temperature of the superheated electron-hole plasma, which ranges from 4000 to 10 000 K, was determined by comparing the measured x-ray absorption spectrum with a simulation. The electronic structure of warm dense copper is adequately described with the high temperature electronic density of state calculated by the density functional theory. Lastly, the dynamics of the electron temperature is consistent with a two-temperature model, while a temperature-dependent electron-phonon coupling parameter is necessary.

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Research Organization:: Univ. of California, Berkeley, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG52-06NA26212

OSTI ID:: 1334345

Alternate ID(s):: OSTI ID: 1100275

Journal Information:: Physical Review Letters, Vol. 106, Issue 16; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 97 works

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