This article is cited in 1 paper

Mechanical properties, strength physics and plasticity

Activation-tunneling dynamics of extended systems in periodic potential relief

B. V. Petukhov

Shubnikov Institute of Crystallography, Federal Research Center "Crystallography and Photonics", Russian Academy of Sciences, Moscow, Russia

Abstract: The dynamics of systems in barrier structures is determined by the rate of fluctuation decay of metastable states in intermediate minima of the potential relief. When the temperature decreases, thermal fluctuations freeze out and are replaced by quantum ones, which leads to a kind of phase transition in the dynamics. The nature of this transition in various systems is analogous to either the second or first kind of transition. The transition temperature depends on the degree of metastability, and can be controlled by an external load. The purpose of this work is to calculate this dependence for an extended system in a tilted periodic relief of the “washboard” type in a wide range of load changes.

Keywords: dynamics of extended systems, metastable states, activation-tunneling transition, collective coordinates.

Received: 15.09.2020
Revised: 21.10.2020
Accepted: 21.10.2020

DOI: 10.21883/FTT.2021.02.50476.197

 English version: Physics of the Solid State, 2021, 63:2, 300–307

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