Electron Kinetics Induced by Ultrafast Photoexcitation of Warm Dense Matter in a 30-nm-Thick Foil.

Autor:	Chen Z; Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G-2V4, Canada., Tsui YY; Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G-2V4, Canada., Mo MZ; Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G-2V4, Canada., Fedosejevs R; Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G-2V4, Canada., Ozaki T; INRS-EMT, University of Quebec, Varennes, Quebec J3X-1S2, Canada., Recoules V; CEA, DAM, DIF, 91297 Arpajon Cedex, France., Sterne PA; Lawerence Livermore National Laboratory, Livermore, California 94550, USA., Ng A; Department of Physics and Astronomy, University of British Colombia, Vancouver, British Colombia V6T-1Z1, Canada.
Jazyk:	angličtina
Zdroj:	Physical review letters [Phys Rev Lett] 2021 Aug 27; Vol. 127 (9), pp. 097403.
DOI:	10.1103/PhysRevLett.127.097403
Abstrakt:	We report on the study of electron kinetics induced by intense femtosecond (fs) laser excitation of electrons in the 5d band of Au. Changes in the electron system are observed from the temporal evolution of ac conductivity and conduction electron density. The results reveal an increase of electron thermalization time with excitation energy density, contrary to the Fermi-liquid behavior of the decrease of thermalization time associated with the heating of conduction electrons. This is attributed to the severe mitigation of photoexcitation by Auger decay. The study also uncovers the shortening of 5d hole lifetime with the increase of photoexcitation rates. These unique findings provide valuable insights for understanding electron kinetics under extreme nonequilibrium conditions.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu