2026-04-13T07:32:38Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1528102025-12-05T11:00:26Zcom_2072_1057col_2072_478907col_2072_478917col_2072_478933

urn:hdl:2445/152810 A model for a driven Frenkel-Kontorova chain Quapp, Wolfgang Bofill i Villà, Josep M. Teories no lineals Matèria condensada Química física Nonlinear theories Condensed matter Physical and theoretical chemistry We study a Frenkel{Kontorova (FK) model of a nite chain with free-end boundary conditions. The model has two competing potentials. Newton trajectories are an ideal tool to understand the circumstances under a driving of an FK chain by external forces. To reach the insights we calculate some stationary structures for a chain with 23 particles. We search the lowest energy saddle points for a complete minimum energy path of the chain for a movement over the full period of the on-site potential, a sliding. If an additional tilting is set, then one is interested in barrier breakdown points (BBPs) on the potential energy surface for a critical tilting force named the static frictional force. In symmetric cases, such BBPs are often valley-ridge in ection points of the potential energy surface. We explain the theory and demonstrate it with an example. We propose a model for a DC drive, as well as an AC drive, of the chain using special directional vectors of the external force. 2020-03-17T10:32:23Z 2020-05-08T05:10:26Z 2019-05-08 2020-03-17T10:32:24Z info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Versió postprint del document publicat a: https://doi.org/10.1140/epjb/e2019-90703-0 European Physical Journal B, 2019, vol. 92, num. 95 https://doi.org/10.1140/epjb/e2019-90703-0 (c) Springer Verlag, 2019 info:eu-repo/semantics/openAccess Springer Verlag Articles publicats en revistes (Química Inorgànica i Orgànica)