Mass transfer in Frenkel-Kontorova chain initiated by molecule impact

The Frenkel-Kontorova chain with a free end is used to study initiation and propagation of crowdions (anti-kinks) caused by impact of a molecule consisting of K atoms. It is found that molecules with 1 < K < 10 are more efficient in initiation of crowdions as compared to single atom (K = 1) be...

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Bibliographic Details
Published in:arXiv.org 2018-05
Main Authors: A Moradi Marjaneh, Saadatmand, D, Evazzade, I, Babicheva, R I, Soboleva, E G, Srikanth, N, Zhou, Kun, Korznikova, E A, Dmitriev, S V
Format: Article
Language:English
Subjects:
Bombardment
Chains
Crowdions
Mass transfer
Online Access:Get full text
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Summary:The Frenkel-Kontorova chain with a free end is used to study initiation and propagation of crowdions (anti-kinks) caused by impact of a molecule consisting of K atoms. It is found that molecules with 1 < K < 10 are more efficient in initiation of crowdions as compared to single atom (K = 1) because total energy needed to initiate the crowdions by molecules is smaller. This happens because single atom can initiate in the chain only sharp, fast-moving crowdions that requires a relatively large energy. Molecule has finite length, that is why it is able to excite a wider crowdion with a smaller velocity and smaller energy. Our results can shed light on the atomistic mechanisms of mass transfer in crystals subject to atom and molecule bombardment.
ISSN:2331-8422
DOI:10.48550/arxiv.1805.07200