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Condensed Matter and Statistical Physics Journal Club

Date: February 25, 2008
Title: Effect of phonon-phonon interactions on localization
Speaker: Abhishek Dhar (Raman Research Institute,Bangalore)
Abstract: I will discuss results on heat conduction in a classical one-dimensional disordered chain with onsite 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 the heat current decays exponentially with system size. Using simulations we find that even a small amount of anharmonicity leads to diffusive transport of energy.