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Kink Dislocations in Layered Lattices with Periodic Interlayer Substrate Interactions
Author(s) -
Dikandé A. M.
Publication year - 1998
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/(sici)1521-3951(199807)208:1<5::aid-pssb5>3.0.co;2-e
Subject(s) - peierls stress , condensed matter physics , dislocation , materials science , substrate (aquarium) , anisotropy , stress (linguistics) , nonlinear system , crystal (programming language) , resistive touchscreen , physics , dislocation creep , optics , quantum mechanics , linguistics , oceanography , philosophy , electrical engineering , engineering , geology , computer science , programming language
Layered crystal lattices undergoing Peierls stresses can be looked out like supperlattices where interlayer interactions play a fundamental role in the mechanism triggering kink dislocations. A model intended to describe such systems is considered in terms of a set of anisotropic (parallel) atomic chains lying on a common substrate which mediates the interactions between the layers. The substrate potential is considered as a nonlinear periodic function of the relative displacements of interlayer atoms, and is responsible for the kink dislocation if assumed as the dominant energy along the main dislocation line. The Peierls‐Nabarro potential and the resistive stress (so called second Peierls stress) governing the migration of dislocations, are estimated.