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The effect of electronic energy loss on the dynamics of thermal spikes in Cu

Published online by Cambridge University Press:  08 February 2011

S. Prönnecke ,
A. Caro ,
M. Victoria ,
T. Diaz de la Rubia  and
M.W. Guinan
S. Prönnecke
Affiliation:
Paul Scherrer Institute, 5232 Villigen, Switzerland
A. Caro
Affiliation:
Paul Scherrer Institute, 5232 Villigen, Switzerland
M. Victoria
Affiliation:
Paul Scherrer Institute, 5232 Villigen, Switzerland
T. Diaz de la Rubia
Affiliation:
Lawrence Livermore National Laboratory, L-644, Livermore, California 94550
M.W. Guinan
Affiliation:
Lawrence Livermore National Laboratory, L-644, Livermore, California 94550
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Abstract

We present results of a molecular dynamics simulation study of the effect of electron-ion interactions on the dynamics of the thermal spike in Cu. Interatomic forces are described with a modified embedded atom method potential. We show that the electron-ion interaction acts to reduce the lifetime of the thermal spike and therefore the amount of atomic rearrangement that takes place in energetic displacement cascades in Cu. The results point toward the important effect that inelastic energy losses might have on the dynamics of displacement cascades in the subcascade energy regime where the lifetime of the thermal spike is expected to exceed the electron-phonon coupling time.

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 3 , March 1991 , pp. 483 - 491
Copyright
Copyright © Materials Research Society 1991

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