Disorder-induced mobility edges and heat flow control in anharmonic acoustic 
chains

Ivanchenko, M. V.; Flach, S.

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Disorder-induced mobility edges and heat flow control in anharmonic acoustic chains

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Flach, S.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Ivanchenko, M. V., & Flach, S. (2011). Disorder-induced mobility edges and heat flow control in anharmonic acoustic chains. EPL, 94(4): 46004.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-8D03-3

Abstract

We control the thermal conductivity of anharmonic acoustic chains by varying the strength of disorder in the interaction. It induces mobility edges in the phonon spectrum. Therefore we limit the amount of extended modes which can ballistically propagate. The rest of the modes becomes localized and opens a diffusive heat conductivity channel. The localized modes are sensitively controlling the contact resistances at the edges. Analytical arguments and numerical results yield several crossovers between dominating heat channels, when varying the system size and the temperature. Copyright (C) EPLA, 2011