2021
DOI: 10.48550/arxiv.2110.10047
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Variational analysis of the $J_1$-$J_2$-$J_3$ model: a non-linear lattice version of the Aviles-Giga functional

Marco Cicalese,
Marwin Forster,
Gianluca Orlando

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 Γ -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.

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