Phonon scattering by localized equilibria of nonlinear nearest-neighbor chains
- Phonon scattering by localized equilibria of nonlinear nearest-neighbor chains
- Kim, S; Baesens, C; MacKay, RS
- Date Issued
- AMERICAN PHYSICAL SOC
- We study scattering of phonons by localized equilibria, for example, localized defects on nonlinear chains. We show that perfect transmission occurs af k=0 at the threshold for creation of localized modes and there exists a characteristic transition involving perfect transmission of long-wavelength phonons near the threshold. The theory is illustrated for the stationary case of a discrete kink on a translationally invariant Hamiltonian nearest neighbor chain, which is then generalized to any symmetric localized defects. The implications for discrete breathers are also discussed.
- Article Type
- PHYSICAL REVIEW E, vol. 56, no. 5, page. R4955 - R4958, 1997-11
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