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Title: Heat conduction in the disordered Fermi-Pasta-Ulam chain
Authors: Dhar, Abhishek
Saito, Keiji
Issue Date: 31-Dec-2008
Publisher: The American Physical Society
Citation: Physical Review E, 2008, Vol.78, p061136
Abstract: We address the question of the effect of disorder on heat conduction in an anharmonic chain with interactions given by the Fermi-Pasta-Ulam (FPU) potential. In contrast to the conclusions of an earlier paper [Phys. Rev. Lett. 86, 63 (2001)], which found that disorder could induce a finite thermal conductivity at low temperatures, we find no evidence of a finite-temperature transition in conducting properties. Instead, we find that at low temperatures, small system-size transport properties are dominated by disorder but the asymptotic system size dependence of current is given by the usual FPU result J~1/N2/3. We also present interesting results on the binary-mass ordered FPU chain.
Description: Open Access
ISSN: 1539-3755
1550-2376 (Online)
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Copyright: (2008) The American Physical Society
Appears in Collections:Research Papers (TP)

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