T. G. White,
N. J. Hartley,
B. Borm,
B. J. B. Crowley,
J. W. O. Harris,
D. C. Hochhaus,
T. Kaempfer,
K. Li,
P. Neumayer,
L. K. Pattison,
F. Pfeifer,
S. Richardson,
A. P. L. Robinson,
I. Uschmann,
and G. Gregori
Electron-Ion Equilibration in Ultrafast Heated Graphite
Phys. Rev. Lett., 112 :145005 (April 2014)
Electron-Ion Equilibration in Ultrafast Heated Graphite
Phys. Rev. Lett., 112 :145005 (April 2014)
Abstract:
We have employed fast electrons produced by intense laser illumination to isochorically heat thermal electrons in solid density carbon to temperatures of ∼10 000 K. Using time-resolved x-ray diffraction, the temperature evolution of the lattice ions is obtained through the Debye-Waller effect, and this directly relates to the electron-ion equilibration rate. This is shown to be considerably lower than predicted from ideal plasma models. We attribute this to strong ion coupling screening the electron-ion interaction.