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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.)

Glassy phases and driven response of the phase-field-crystal model with random pinning

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Author(s):
Granato, E. [1, 2] ; Ramos, J. A. P. [1, 3] ; Achim, C. V. [4, 5] ; Lehikoinen, J. [4] ; Ying, S. C. [2] ; Ala-Nissila, T. [2, 4] ; Elder, K. R. [6]
Total Authors: 7
Affiliation:
[1] Inst Nacl Pesquisas Espaciais, Lab Associado Sensores & Mat, BR-12227010 Sao Jose Dos Campos, SP - Brazil
[2] Brown Univ, Dept Phys, Providence, RI 02912 - USA
[3] Univ Estadual Sudoeste Bahia, Dept Ciencias Exatas, BR-45000000 Vitoria Da Conquista, BA - Brazil
[4] Aalto Univ, Sch Sci, Dept Appl Phys, FI-00076 Espoo - Finland
[5] Univ Dusseldorf, Inst Theoret Phys Weiche Materie 2, DE-40225 Dusseldorf - Germany
[6] Oakland Univ, Dept Phys, Rochester, MI 48309 - USA
Total Affiliations: 6
Document type: Journal article
Source: Physical Review E; v. 84, n. 3, 1 SEP 1 2011.
Web of Science Citations: 10
Abstract

We study the structural correlations and the nonlinear response to a driving force of a two-dimensional phase-field-crystal model with random pinning. The model provides an effective continuous description of lattice systems in the presence of disordered external pinning centers, allowing for both elastic and plastic deformations. We find that the phase-field crystal with disorder assumes an amorphous glassy ground state, with only short-ranged positional and orientational correlations, even in the limit of weak disorder. Under increasing driving force, the pinned amorphous-glass phase evolves into a moving plastic-flow phase and then, finally, a moving smectic phase. The transverse response of the moving smectic phase shows a vanishing transverse critical force for increasing system sizes. (AU)

FAPESP's process: 07/08492-9 - Dynamics, topological defects and phase transitions in ordered media
Grantee:Enzo Granato
Support type: Research Projects - Thematic Grants