Calculus of Variations and Geometric Measure Theory

M. Cicalese - M. Forster - G. Orlando

Variational analysis of the $J_1$-$J_2$-$J_3$ model: a non-linear lattice version of the Aviles-Giga functional

created by orlando on 29 Aug 2021
modified by cicalese on 25 Jun 2022

[BibTeX]

Accepted Paper

Inserted: 29 aug 2021
Last Updated: 25 jun 2022

Journal: Arch. Ration. Mech. anal.
Year: 2021

Abstract:

We study the variational limit of the frustrated $J_1$-$J_2$-$J_3$ spin model on the square lattice in the vicinity of the ferromagnet$/$helimagnet transition point as the lattice spacing vanishes. We carry out the $\Gamma$-convergence analysis of proper scalings of the energy and we characterize the optimal cost of a chirality transition in $BV$ proving that the system is asymptotically driven by a discrete version of a non-linear perturbation of the Aviles-Giga energy functional.

Keywords: Gamma-convergence, Eikonal equation, Chirality transitions, frustrated spin systems, Aviles-Giga functional


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