Stiffness from Disorder in Triangular-Lattice Ising Thin Films
Abstract
We study the triangular lattice Ising model with a finite number of vertically stacked layers and demonstrate a low temperature reentrance of two Berezinskii-Kosterlitz-Thouless transitions, which results in an extended disordered regime down to . Numerical results are complemented with the derivation of an effective low-temperature dimer theory. Contrary to order by disorder, we present a new scenario for fluctuation-induced ordering in frustrated spin systems. While short-range spin-spin correlations are enhanced by fluctuations, quasi-long-range ordering is precluded at low enough temperatures by proliferation of topological defects.
Cite
@article{arxiv.1310.3468,
title = {Stiffness from Disorder in Triangular-Lattice Ising Thin Films},
author = {Shi-Zeng Lin and Yoshitomo Kamiya and Gia-Wei Chern and Cristian D. Batista},
journal= {arXiv preprint arXiv:1310.3468},
year = {2014}
}
Comments
8 pages, 8 figures; version 3; Replacement of "Reentrant Berezinskii-Kosterlitz-Thouless Transition in a Triangular Ising Thin Film" (http://arxiv.org/abs/1310.3468v2); published in Phys. Rev. Lett