Excitation of intense acoustic waves in hexagonal crystals

Journal Article · Fri Nov 15 00:00:00 EST 2013 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774513060047· OSTI ID:22210421

Bessonov, D. A.; Lyubimov, V. N. ^[1]

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1. Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)

Resonant excitation of an intense elastic wave using reflection of a pump wave from a free surface of hexagonal crystal is described. A resonance arises in the case of specially chosen propagation geometry where the reflecting boundary slightly deviates from symmetric orientation and the propagation direction of an intense reflected wave is close to that of an exceptional bulk wave, which satisfies the free boundary condition in unperturbed symmetric orientation. It is shown that, in crystals with elastic moduli c{sub 44}>c{sub 66}, a resonance arises when the initial boundary is chosen parallel to the hexagonal axis 6, whereas in crystals characterized by the relation c{sub 44}

• OSTI ID: 22210421
• Journal Information: Crystallography Reports, Vol. 58, Issue 6; Other Information: Copyright (c) 2013 Pleiades Publishing, Inc.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTALS
EXCITATION
RESONANCE
SOUND WAVES
SURFACES