Eur. Phys. J. B 34, 99-103 (2003)
https://doi.org/10.1140/epjb/e2003-00200-x

Phonon–mediated anomalous dynamics of defects

Institute for Advanced Studies in Basic Sciences, Zanjan 45195-159, Iran

Corresponding author: ^a golestan@iasbs.ac.ir

Received: 18 February 2003
Published online: 23 July 2003

Abstract

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.