Journal
PHYSICAL REVIEW LETTERS
Volume 86, Issue 18, Pages 4029-4032Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.4029
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We examine the interplay of surface and volume effects in systems undergoing heat flow. In particular. we compute the thermal conductivity in the Fermi-Pasta-Ulam beta model as a function of temperature and lattice size, and scaling arguments are used to provide analytic guidance. From this we show that boundary temperature jumps can be quantitatively understood, and that they play an important role in determining the dynamics of the system, relating soliton dynamics, kinetic theory, and Fourier transport.
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