Electron-lattice coupling after high-energy deposition in aluminum

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:354

Article

Gorbunov, S. A.¹  Medvedev, N. A.²  Terekhin, P. N.³  Volkov, A. E.^1,3,4 

[1] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia

[2] DESY, Ctr Free Electron Laser, D-22607 Hamburg, Germany

[3] Natl Res Ctr, Kurchatov Inst, Moscow 123182, Russia

[4] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia

关键词: Electron-lattice coupling;    Dynamic-structure factor;    Ion track;    Laser spot;   

DOI  :  10.1016/j.nimb.2014.11.053

来源: Elsevier

【 摘 要 】

This paper presents an analysis of the parameters of highly-excited electron subsystem of aluminum, appearing e.g. after swift heavy ion impact or laser pulse irradiation. For elevated electron temperatures, the electron heat capacity and the screening parameter are evaluated. The electron-phonon approximation of electron-lattice coupling is compared with its precise formulation based on the dynamic structure factor (DSF) formalism. The DSF formalism takes into account collective response of a lattice to excitation including all possible limit cases of this response. In particular, it automatically provides realization of electron-phonon coupling as the low-temperature limit, while switching to the plasma-limit for high electron temperatures. Aluminum is chosen as a good model system for illustration of the presented methodology. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

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