Phys. Rev. B 48, 13508 - 13511 (1993)Anharmonic gap modes in a perfect one-dimensional diatomic lattice for standard two-body nearest-neighbor potentials |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1974: |
S. A. Kiselev, S. R. Bickham, and A. J. Sievers
Laboratory of Atomic and Solid State Physics and Materials Science Center, Cornell University, Ithaca, New York 14853-2501
Received 14 April 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/abstract/PRB/v48/p13508
DOI: 10.1103/PhysRevB.48.13508
PACS: 63.20.Ry, 63.20.Pw
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