Acoustic wave in a black phosphorene under longitudinal compression
Ivan D. Kolesnikov, 1, Sergey V. Dmitriev, 2, 1 Saratov State University, Saratov, Russia, 2 Institute of Molecule and Crystal Physics, Ufa Federal Research Center, Russia
Abstract
Acoustic waves in a solid arise as a result of longitudinal continuous compression of the material. The distribution of acoustic waves in solids in comparison with gases has its own characteristics, which are caused by differences in the internal structure of solids, on the one hand, and gases, on the other. The forces of interaction between atoms and molecules of solids, unlike gases, are large. The compressibility of solids is small. For this reason, the velocity of the medium behind the acoustic wave front is much less than the velocity of the wave itself. The propagation of acoustic waves in two-dimensional nanomaterials has been studied much less than in bulk crystals. The excitation and propagation of acoustic waves in monolayer black phosphorene is modeled and analyzed using molecular dynamics methods. The acoustic wave is initiated by a piston moving at a constant speed. The dynamic characteristics of the acoustic wave propagation in a crystal lattice along two crystallographic directions are analyzed: the chair and the zigzag in time and depending on the piston velocity. The evolution of the structure of phosphorene in time during compression is studied in detail. These results contribute to understanding the nonlinear dynamics of the acoustic wave in two-dimensional materials.
The work was carried out with the financial support of the Council for Grants of the President of the Russian Federation for the state support of young scientists - Candidates of Sciences, grant No MK-891.2022.1.2.
Speaker
Igor A. Shepelev
Saratov State University
Russia
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