Heating electrons with ion irradiation: A first-principles approach

Pruneda, J. M. and Sánchez-Portal, D. and Arnau, A. and Juaristi, J. I. and Artacho, E. (2009) Heating electrons with ion irradiation: A first-principles approach. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 267 (4). pp. 590-593. ISSN 0168-583X DOI 10.1016/j.nimb.2008.11.012

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Abstract

Using time-dependent density functional theory we calculate from first-principles the rate of energy transfer from a moving charged particle to the electrons in an insulating material. The behavior of the electronic stopping power in LiF (a wide band gap insulator) versus projectile velocity displays an effective threshold velocity of 8.2 Bohr/asec for the proton, consistent with recent experimental observations. The calculated proton/antiproton stopping power ratio is 2.4 at velocities slightly above the threshold (16.5 Bohr/asec) as compared to the experimental value of 2.1. The approximations introduced in this new non-perturbative methodology are discussed, and results on the velocity dependence of the stopping power, the locality of the energy transfer, and other characteristics of the host material are presented.

Item Type:	Article
Uncontrolled Keywords:	08AREP IA57 2009 P
Subjects:	03 - Mineral Sciences
Divisions:	03 - Mineral Sciences
Journal or Publication Title:	Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Volume:	267
Page Range:	pp. 590-593
Identification Number:	10.1016/j.nimb.2008.11.012
Depositing User:	Sarah Humbert
Date Deposited:	16 Feb 2009 13:03
Last Modified:	23 Jul 2013 10:08
URI:	http://eprints.esc.cam.ac.uk/id/eprint/613

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