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Anti-Fermi-Pasta-Ulam energy recursion in diatomic lattices at low energy densities

Dmitriev, Sergey V; Sukhorukov, Andrey; Pshenichnyuk, Anatoly I; Khadeeva, Liya Z; Iskandarov, Albert M; Kivshar, Yuri

Description

We study the dynamics of one- and two-dimensional diatomic lattices with the interatomic Morse potentials for the initial conditions selected at the edge of the Brillouin zone of the dispersion spectrum, when only light atoms are excited with the staggered mode while all heavy atoms remain at rest (the so-called anti-Fermi-Pasta-Ulam problem). We demonstrate that modulational instability of such a nonlinear state may result in almost periodic temporal dynamics of the lattice with spatial...[Show more]

CollectionsANU Research Publications
Date published: 2009
Type: Journal article
URI: http://hdl.handle.net/1885/50321
Source: Physical Review B: Condensed Matter and Materials
DOI: 10.1103/PhysRevB.80.094302

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