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VOLUME 51 (1990) | ISSUE 9 | PAGE 481
Localized excitations of uniform anharmonic lattices
The localized and resonant intrinsic vibrations in an anharmonic lattice which have been predicted theoretically [A. J. Sievers and S. Takeno, Phys. Rev. Lett. 61, 970 (1988); S. Takeno and A. J. Sievers, Solid State Commun. 67,1023 (1988); S. Takeno et ah, Prog. Theor. Phys. 94,242 (1988) ] and which have been observed in a numerical simulation [V. M. Burlakov et ah, Preprint 12, Institute of Spectroscopy, Academy of Sciences of the USSR, Troitsk ] are shown to be genetically related to envelope solitons. An instability of a uniform excitation of the lattice with respect to decay into localized intrinsic vibrations has been observed.