Lattice-dynamics of a Disordered solid-solid Interface

Details Lattice-dynamics of a Disordered solid-solid Interface Lattice-dynamics of a Disordered solid-solid Interface

1999-03-31

arxiv.org/abs/cond-mat/9903457v1

Phys. Rev. B 60, pp 6459-6464 (1999)

Physics

Condensed Matter

17 pages, 5 figures, submitted to PRB

Scientific paper

10.1103/PhysRevB.60.6459

Generic properties of elastic phonon transport at a disordered interface are studied. The results show that phonon transmittance is a strong function of frequency and the disorder correlation length. At frequencies lower than the van Hove singularity the transmittance at a given frequency increases as the correlation length decreases. At low frequencies, this is reflected by different power-laws for phonon conductance across correlated and uncorrelated disordered interfaces which are in approximate agreement with perturbation theory of an elastic continuum. These results can be understood in terms of simple mosaic and two-colour models of the interface.

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