Surface energies emerging in a microscopic, two-dimensional two-well problem

In this article we are interested in the microscopic modeling of a two-dimensional two-well problem which arises from the square-to-rectangular transformation in (two-dimensional) shape-memory materials. In this discrete set-up, we focus on the surface energy scaling regime and further analyze the H...

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Hauptverfasser: Kitavtsev, Georgy (VerfasserIn) , Luckhaus, Stephan (VerfasserIn) , Rüland, Angkana (VerfasserIn)
Dokumenttyp: Article (Journal) Kapitel/Artikel
Sprache:Englisch
Veröffentlicht: 28 Sep 2015
In: Arxiv
Year: 2015, Pages: 1-50
Online-Zugang:Verlag, lizenzpflichtig, Volltext: http://arxiv.org/abs/1509.08220
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Verfasserangaben:Georgy Kitavtsev, Stephan Luckhaus, and Angkana Rüland

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520 |a In this article we are interested in the microscopic modeling of a two-dimensional two-well problem which arises from the square-to-rectangular transformation in (two-dimensional) shape-memory materials. In this discrete set-up, we focus on the surface energy scaling regime and further analyze the Hamiltonian which was introduced in \cite{KLR14}. It turns out that this class of Hamiltonians allows for a direct control of the discrete second order gradients and for a one-sided comparison with a two-dimensonal spin system. Using this and relying on the ideas of Conti and Schweizer \cite{CS06}, \cite{CS06a}, \cite{CS06c}, which were developed for a continuous analogue of the model under consideration, we derive a (first order) continuum limit. This shows the emergence of surface energy in the form of a sharp-interface limiting model as well the explicit structure of the minimizers to the latter. 
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