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On the Theory of Atomic Migration in Monatomic Crystals
Author(s) -
Buchbinder G. L.
Publication year - 1986
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221360217
Subject(s) - monatomic ion , jump , vacancy defect , atom (system on chip) , condensed matter physics , embedded atom model , lattice (music) , quantum , transition state theory , transition point , lattice constant , atomic physics , physics , quantum mechanics , thermodynamics , molecular dynamics , computer science , acoustics , diffraction , embedded system , reaction rate constant , kinetics
The frequency of the overbarrier atomic jumps into a neighbour vacant site is calculated at high temperatures. The atom adjacent to a vacancy is in a two‐well potential constructed by its neighbours. The jump into a vacant site is considered as a transition of the atom from some quantum mechanical state of this potential into another one caused by interaction with its neighbours. It is assumed that the necessary condition for a jump is the transition of the atom from some state, localized in a lattice point, to a overbarrier state. Being at a overbarrier state the atom vibrates in a region whose size is compared with the lattice constant.
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