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

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 1...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2011-04, Vol.106 (16), p.167601-167601, Article 167601
Main Authors: 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
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.106.167601