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Phonon contribution to friction stress in an atomically flat contact of crystalline solids at low temperature
Author(s) -
Popov V.
Publication year - 2000
Publication title -
zamm ‐ journal of applied mathematics and mechanics / zeitschrift für angewandte mathematik und mechanik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.449
H-Index - 51
eISSN - 1521-4001
pISSN - 0044-2267
DOI - 10.1002/zamm.20000801317
Subject(s) - phonon , condensed matter physics , materials science , dielectric , slip (aerodynamics) , quantum , physics , thermodynamics , quantum mechanics , optoelectronics
It has recently been shown both experimentally and theoretically that there is no static friction in a contact of atomically flat crystalline solids provided the periods of their lattices are incommensurate and their interaction does not exceed some critical value. In dielectric materials, the only mechanism of friction in this case is generation of phonons. In the present paper, it is shown that, at low temperatures, the phonon contribution to the friction force can be very small by virtue of the quantum mechanical nature of the elementary excitations in a solid. Incommensurate dielectric crystals could therefore slip at low temperatures practically without friction.