Classical Two and Three-Body Interatomic Potentials for Silicon Simulations
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ABSTRACTWe develop two and three-body classical interatomic potentials that model structural energies for silicon. These potentials provide a global fit to a database of firstprinciples calculations of the energy for bulk and surface silicon structures which spans a wide range of atomic coordinations and bonding geometries. This is accomplished using a new “separable” form for the 3-body potential that reduces the 3-body energy to a product of 2-body sums and leads to computations of the energy and atomic forces in n2 steps as opposed to n3 for a general 3-body potential. Simulated annealing is performed to find globally minimum energy states of Si-atom clusters with these potentials using a Langevin molecular dynamics approach.
2003 ◽
Vol 5
(9)
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pp. 1211-1216
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2000 ◽
Vol 12
(28)
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pp. 6173-6182
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2002 ◽
Vol 13
(06)
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pp. 759-769
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1998 ◽
Vol 4
(3)
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pp. 383-388
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