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

Authors

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

Document Type

Article

Publication Date

4-20-2011

Publisher

American Physical Society

Abstract

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. The dynamics of the electron temperature is consistent with a two-temperature model, while a temperature-dependent electron-phonon coupling parameter is necessary.

Comments

Copyright © 2011 American Physical Society. Reprinted with permission.

Recommended Citation

Cho, B. I., Engelhorn, K., Correa, A. A., Ogitsu, T., Weber, C. P., Lee, H. J., … Heimann, P. A. (2011). Electronic Structure of Warm Dense Copper Studied by Ultrafast X-Ray Absorption Spectroscopy. Physical Review Letters, 106(16), 167601. https://doi.org/10.1103/PhysRevLett.106.167601