Phys. Rev. B 48, 13508–13511 (1993)Anharmonic gap modes in a perfect one-dimensional diatomic lattice for standard two-body nearest-neighbor potentialsReceived 14 April 1993; published in the issue dated 1 November 1993 Two-body potentials of the Toda, Born-Mayer, Lennard-Jones, and Morse type are used in a one-dimensional diatomic lattice to demonstrate both analytically and numerically that stable anharmonic gap modes are a general feature of these perfect lattices. Associated with each vibrational mode is a localized dc lattice expansion, which forms an integral part of this dynamical configuration. © 1993 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.48.13508
DOI:
10.1103/PhysRevB.48.13508
PACS:
63.20.Ry, 63.20.Pw
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