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Quantum and Classical Molecular Dynamics Studies of the Threshold Displacement Energy in Si Bulk and Nanowires
Published online by Cambridge University Press: 31 January 2011
Abstract
Using quantum mechanical and classical molecular dynamics computer simulations, we study the full three-dimensional threshold displacement energy surface in Si. We show that the SIESTA density-functional theory method gives a minimum threshold energy of 13 eV that agrees very well with experiments, and predicts an average threshold displacement energy of 36 eV. Using the quantum mechanical result as a baseline, we discuss the reliability of the classical potentials with respect to their description of the threshold energies. We also examine the threshold energies for sputtering in a nanowire, and find that this threshold depends surprisingly strongly on which layer the atom is in.
- Type
- Research Article
- Information
- MRS Online Proceedings Library (OPL) , Volume 1181: Symposium DD – Ion Beams and Nano-Engineering , 2009 , 1181-DD05-02
- Copyright
- Copyright © Materials Research Society 2009
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