Phonon-Mediated Anomalous Dynamics of Defects

Details Phonon-Mediated Anomalous Dynamics of Defects Phonon-Mediated Anomalous Dynamics of Defects

2002-07-15

arxiv.org/abs/cond-mat/0207365v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 2 eps figues included

Scientific paper

10.1140/epjb/e2003-00200-x

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.

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