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Title: Properties of Moving Discrete Breathers in Beryllium

Abstract

Discrete breathers (DBs) have been described among pure metals with face-centered cubic (FCC) and body-centered cubic (BCC) lattice, but for hexagonal close-packed (HCP) metals, their properties are little studied. In this paper, the properties of standing and moving DBs in beryllium HCP metal are analyzed by the molecular dynamics method using the many-body interatomic potential. It is shown that the DB is localized in a close-packed atomic row in the basal plane, while oscillations with a large amplitude along the close-packed row are made by two or three atoms, moving in antiphase with the nearest neighbors. Dependences of the DB frequency on the amplitude, as well as the velocity of the DB on its amplitude and on parameter δ, which determines the phase difference of the oscillations of neighboring atoms, are obtained. The maximum velocity of the DB movement in beryllium reaches 4.35 km/s, which is 33.7% of the velocity of longitudinal sound waves. The obtained results supplement our concepts about the mechanisms of localization and energy transport in HCP metals.

Authors:
 [1];  [2];  [3]; ;  [2]
  1. State Petroleum Technical University (Russian Federation)
  2. Russian Academy of Sciences, Institute of Metal Superplasticity Problems (Russian Federation)
  3. Ammosov North-Eastern Federal University, Polytechnic Institute (Branch) (Russian Federation)
Publication Date:
OSTI Identifier:
22771107
Resource Type:
Journal Article
Journal Name:
Physics of the Solid State
Additional Journal Information:
Journal Volume: 60; Journal Issue: 5; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7834
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AMPLITUDES; ATOMS; BCC LATTICES; BERYLLIUM; FCC LATTICES; HCP LATTICES; MANY-BODY PROBLEM; MOLECULAR DYNAMICS METHOD; OSCILLATIONS; POWER TRANSMISSION; SOUND WAVES; VELOCITY

Citation Formats

Bachurina, O. V., E-mail: obachurina@yahoo.com, Murzaev, R. T., Semenov, A. S., Korznikova, E. A., and Dmitriev, S. V. Properties of Moving Discrete Breathers in Beryllium. United States: N. p., 2018. Web. doi:10.1134/S1063783418050049.
Bachurina, O. V., E-mail: obachurina@yahoo.com, Murzaev, R. T., Semenov, A. S., Korznikova, E. A., & Dmitriev, S. V. Properties of Moving Discrete Breathers in Beryllium. United States. doi:10.1134/S1063783418050049.
Bachurina, O. V., E-mail: obachurina@yahoo.com, Murzaev, R. T., Semenov, A. S., Korznikova, E. A., and Dmitriev, S. V. Tue . "Properties of Moving Discrete Breathers in Beryllium". United States. doi:10.1134/S1063783418050049.
@article{osti_22771107,
title = {Properties of Moving Discrete Breathers in Beryllium},
author = {Bachurina, O. V., E-mail: obachurina@yahoo.com and Murzaev, R. T. and Semenov, A. S. and Korznikova, E. A. and Dmitriev, S. V.},
abstractNote = {Discrete breathers (DBs) have been described among pure metals with face-centered cubic (FCC) and body-centered cubic (BCC) lattice, but for hexagonal close-packed (HCP) metals, their properties are little studied. In this paper, the properties of standing and moving DBs in beryllium HCP metal are analyzed by the molecular dynamics method using the many-body interatomic potential. It is shown that the DB is localized in a close-packed atomic row in the basal plane, while oscillations with a large amplitude along the close-packed row are made by two or three atoms, moving in antiphase with the nearest neighbors. Dependences of the DB frequency on the amplitude, as well as the velocity of the DB on its amplitude and on parameter δ, which determines the phase difference of the oscillations of neighboring atoms, are obtained. The maximum velocity of the DB movement in beryllium reaches 4.35 km/s, which is 33.7% of the velocity of longitudinal sound waves. The obtained results supplement our concepts about the mechanisms of localization and energy transport in HCP metals.},
doi = {10.1134/S1063783418050049},
journal = {Physics of the Solid State},
issn = {1063-7834},
number = 5,
volume = 60,
place = {United States},
year = {2018},
month = {5}
}