Effect of phonon-phonon interactions on localization

Details Effect of phonon-phonon interactions on localization Effect of phonon-phonon interactions on localization

2007-08-30

arxiv.org/abs/0708.4171v3

Phys. Rev. Lett. 100, 134301 (2008)

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 2 figures, Published version

Scientific paper

10.1103/PhysRevLett.100.134301

We study the heat current J in a classical one-dimensional disordered chain with on-site pinning and with ends connected to stochastic thermal reservoirs at different temperatures. In the absence of anharmonicity all modes are localized and there is a gap in the spectrum. Consequently J decays exponentially with system size N. Using simulations we find that even a small amount of anharmonicity leads to a J~1/N dependence, implying diffusive transport of energy.

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