Effect of phonon-phonon interactions on localization

Dhar, Abhishek ; Lebowitz, J. L. (2008) Effect of phonon-phonon interactions on localization Physical Review Letters, 100 (13). 134301_1-134301_4. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v100/i13/e134301

Related URL: http://dx.doi.org/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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Source:Copyright of this article belongs to The American Physical Society.
ID Code:79679
Deposited On:28 Jan 2012 12:10
Last Modified:18 May 2016 21:57

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