Phonon–mediated anomalous dynamics of defects
Institute for Advanced Studies in Basic Sciences,
Zanjan 45195-159, Iran
Corresponding author: a firstname.lastname@example.org
Published online: 23 July 2003
Dynamics of an array of line defects interacting with a background elastic medium is studied in the linear regime. It is shown that the inertial coupling between the defects and the ambient phonons leads to an anomalous response behavior for the deformation modes of a defect-lattice, in the form of anisotropic and anomalous mass and elastic constants, resonant dissipation through excitation of phonons, and instabilities. The case of a single fluctuating line defect is also studied, and it is shown that it could lead to formation of shock waves in the elastic medium for sufficiently high frequency deformation modes.
PACS: 63.20.Mt – Phonon-defect interactions / 61.72.Bb – Theories and models of crystal defects / 66.30.Lw – Diffusion of other defects
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003