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Updated: Oct 16, 2025

Characterization of Thermal Transport in One-dimensional Solid Materials
Published on: January 26, 2014
Effect of pressure on thermalization of one-dimensional nonlinear chains
Weicheng Fu1,2, Yong Zhang3,2, Hong Zhao3,2
1Department of Physics, Tianshui Normal University, Tianshui 741001, Gansu, China.
Abstract:
Pressure plays a vital role in changing the transport properties of matter. To understand this phenomenon at a microscopic level, we here focus on a more fundamental problem, i.e., how pressure affects the thermalization properties of solids. As illustrating examples, we study the thermalization behavior of the monatomic chain and the mass-disordered chain of Fermi-Pasta-Ulam-Tsingou-β under different strains in the thermodynamic limit. It is found that the pressure-induced change in integrability results in qualitatively different thermalization processes for the two kinds of chains. However, for both cases, the thermalization time follows the same law-it is inversely proportional to the square of the nonintegrability strength. This result suggests that pressure can significantly change the integrability of a system, which provides a new perspective for understanding the pressure-dependent thermal transport behavior.
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