Dynamics and Stability of Subsonic Crowdion Clusters in 2D Morse Crystal


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Аннотация

Recently, the concept of supersonic N-crowdions was offered. In molecular dynamics simulations, they can be excited by initial kick of N neighboring atoms located in one close-packed atomic row along this row. In the present study, in 2D Morse crystal, we apply initial kick to M neighboring atoms located in neighboring close-packed atomic rows along these rows. This way, we initiate crowdion clusters called subsonic M-crowdions. It is well known that static 1-crowdion in 2D Morse lattice is unstable; as a result, the interstitial atom leaves the close-packed atomic row and becomes immobile. However, we show that 1-crowdion moving with sufficiently large subsonic velocity remains in the close-packed atomic row. Crowdion clusters with M equal to or greater than 2 appear to be stable even at rest, with growing M transforming into prismatic dislocation loops. It is important to note that stable subsonic M-crowdions (M > 1) remain mobile and they can carry interstitial atoms over long distances.

Авторлар туралы

E. Korznikova

Institute for Metals Superplasticity Problems, Russian Academy of Sciences; Ufa State Aviation Technical University; Saratov Chernyshevsky National Research State University

Хат алмасуға жауапты Автор.
Email: elena.a.korznikova@gmail.com
Ресей, Ufa, 450001; Ufa, 450008; Saratov, 410012

I. Shepelev

Saratov Chernyshevsky National Research State University

Email: elena.a.korznikova@gmail.com
Ресей, Saratov, 410012

A. Chetverikov

Saratov Chernyshevsky National Research State University

Email: elena.a.korznikova@gmail.com
Ресей, Saratov, 410012

S. Dmitriev

Institute for Metals Superplasticity Problems, Russian Academy of Sciences; Saratov Chernyshevsky National Research State University; National Research Tomsk State University

Email: elena.a.korznikova@gmail.com
Ресей, Ufa, 450001; Saratov, 410012; Tomsk, 634050

S. Fomin

Ufa State Aviation Technical University

Email: elena.a.korznikova@gmail.com
Ресей, Ufa, 450008

Kun Zhou

School of Mechanical and Aerospace Engineering, Nanyang Technological University

Email: elena.a.korznikova@gmail.com
Сингапур, 50 Nanyang Avenue, Singapore, 639798

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