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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Dynamical transitions and sliding friction of the phase-field-crystal model with pinning

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Ramos, J. A. P. [1, 2] ; Granato, E. [3, 2] ; Ying, S. C. [3] ; Achim, C. V. [4, 5, 6] ; Elder, K. R. [7] ; Ala-Nissila, T. [3, 4, 5]
Total Authors: 6
[1] Univ Estadual Sudoeste Bahia, Dept Ciencias Exatas, BR-45000000 Vitoria De Conquista, BA - Brazil
[2] Inst Nacl Pesquisas Espaciais, Lab Associado Sensores & Mat, BR-12245970 Sao Jose Dos Campos, SP - Brazil
[3] Brown Univ, Dept Phys, Providence, RI 02912 - USA
[4] Aalto Univ, Dept Appl Phys, FI-02015 Espoo - Finland
[5] Aalto Univ, COMP Ctr Excellence, FI-02015 Espoo - Finland
[6] Univ Dusseldorf, Inst Theoret Phys Weiche Mat 2, D-40225 Dusseldorf - Germany
[7] Oakland Univ, Dept Phys, Rochester, MI 48309 - USA
Total Affiliations: 7
Document type: Journal article
Source: Physical Review E; v. 81, n. 1, 1 JAN 2010.
Web of Science Citations: 32

We study the nonlinear driven response and sliding friction behavior of the phase-field-crystal (PFC) model with pinning including both thermal fluctuations and inertial effects. The model provides a continuous description of adsorbed layers on a substrate under the action of an external driving force at finite temperatures, allowing for both elastic and plastic deformations. We derive general stochastic dynamical equations for the particle and momentum densities including both thermal fluctuations and inertial effects. The resulting coupled equations for the PFC model are studied numerically. At sufficiently low temperatures, we find that the velocity response of an initially pinned commensurate layer shows hysteresis with dynamical melting and freezing transitions for increasing and decreasing applied forces at different critical values. The main features of the nonlinear response in the PFC model are similar to the results obtained previously with molecular dynamics simulations of particle models for adsorbed layers. (AU)

FAPESP's process: 09/01942-4 - See Chen Ying | Brown University - Estados Unidos
Grantee:Enzo Granato
Support type: Research Grants - Visiting Researcher Grant - International
FAPESP's process: 07/08492-9 - Dynamics, topological defects and phase transitions in ordered media
Grantee:Enzo Granato
Support type: Research Projects - Thematic Grants