Open AccessДинамические смещения атомов и атермическое скольжение дислокаций в кристаллах
Author(s) -
Ю. А. Хон,
H. Zapolsky
Publication year - 2020
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2020.04.49112.533
Subject(s) - dislocation , instability , amplitude , vibration , crystal (programming language) , peierls stress , condensed matter physics , materials science , physics , dislocation creep , mechanics , optics , quantum mechanics , computer science , programming language
A dislocation glide mechanism at low temperatures is proposed. The mechanism is based on taking into account the dynamic displacements of atoms — displacements caused by nonadiabatic transitions of atoms in a crystal with a dislocation under the action of an external force. Dynamic displacements initiate the instability of a direct dislocation of relatively low-amplitude displacements during atomic vibrations. The development of instability leads to the formation of a double kink and a dislocation shift by one interatomic distance.