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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.)

Commensurate-incommensurate transition and domain wall dynamics of adsorbed overlayers on a honeycomb substrate

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Author(s):
Elder, K. R. ; Achim, C. V. ; Granato, E. ; Ying, S. C. ; Ala-Nissila, T.
Total Authors: 5
Document type: Journal article
Source: EPL; v. 116, n. 5 DEC 2016.
Web of Science Citations: 1
Abstract

We introduce an effective one-mode phase-field crystal model for studying the commensurate-incommensurate transition and domain wall dynamics of the (root 3 x root 3) R30 degrees. phase found in systems such as Xe/Pt(111), or Xe and Kr on graphite. The model allows us to study large systems where the domain walls can be separated over large macroscopic distances and at the same time incorporate the microscopic details of the domain wall structures. The resulting phase diagram shows that an intermediate stripe incommensurate phase always separates the commensurate phase from the honeycomb incommensurate phases. The energy of the domain wall crossing is investigated. We also find that near a step edge, the domain walls tend to align perpendicularly to the step edge, in agreement with recent experimental observations. Copyright (C) EPLA, 2016 (AU)

FAPESP's process: 14/15372-3 - Dynamics and topological defects in periodic media
Grantee:Enzo Granato
Support type: Regular Research Grants