Fizika Nizkikh Temperatur: Volume 47, Number 10 (October 2021), p. 956-962    ( to contents , go back )

Shear elastic surface waves and system symmetry

A. S. Kovalev1,2 and E. S. Syrkin1

1B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine Kharkiv 61103, Ukraine

2V. N. Karazin Kharkiv National Univercity of Ministry of Education and Science of Ukraine Kharkiv 61022, Ukraine
E-mail: syrkin@ilt.kharkov.ua
pos Анотація:741

Received March 9, 2021, published online August 26, 2021

Abstract

The effect of the anisotropy of an elastic medium and a crystal on the properties of surface waves is considered. It leads to symmetry breaking of a semi-bounded space with respect to reflection. This fact affects the possibility of the existence and properties of surface elastic shear waves. It is shown that, while maintaining the crystallographic symmetry in crystals with the surface orientation (110), the anisotropy breaks the indicated symmetry, but retains the possibility of propagation of surface waves with their strong modification. In the case of an anisotropic half-space with a thin film coating, which allows the propagation of the Love waves in an isotropic medium, anisotropy leads to the absence of such stationary waves.

Key words: surface waves, shear waves, Love waves, crystallographic symmetry.

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