Title: Aubry transition studied by direct evaluation of the modulation functions of infinite incommensurate systems
Authors: Van Erp, Titus ×
Fasolino, A #
Issue Date: Aug-2002
Publisher: E d p sciences
Series Title: Europhysics letters vol:59 issue:3 pages:330-336
Abstract: Incommensurate structures can be described by the Frenkel-Kontorova model. Aubry has shown that, at a critical value K c of the coupling of the harmonic chain to an incommensurate periodic potential, the system displays the analyticity-breaking transition between a sliding and pinned state. The ground-state equations coincide with the standard map in non-linear dynamics, with smooth or chaotic orbits below and above K-c, respectively. For the standard map, Greene and MacKay have calculated the value K-c = 0.971635. Conversely, evaluations based on the analyticity breaking of the modulation function have been performed for high commensurate approximants. Here we show how the modulation function of the infinite system can be calculated without using approximants but by Taylor expansions of increasing order. This approach leads to a value K'(c) = 0.97978, implying the existence of a golden invariant circle up to K-c' > K-c.
ISSN: 0295-5075
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
× corresponding author
# (joint) last author

Files in This Item:
File Description Status SizeFormat
EurPhysLett2002.pdf Published 258KbAdobe PDFView/Open Request a copy

These files are only available to some KU Leuven Association staff members


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science