Magnetism in Rare Earth Quasicrystals: RKKY Interactions and Ordering
Strongly Correlated Electrons
2015-05-19 v2 Statistical Mechanics
Abstract
We study magnetism in simple models for rare earth quasicrystals by means of a two-step theoretical approach. First, we compute RKKY interactions from a tight-binding Hamiltonian defined on a two-dimensional quasiperiodic tiling. Second, we examine the statistical mechanics of Ising spins coupled via these interactions using Monte Carlo simulations. We find the emergence of strongly coupled spin clusters with significantly weaker inter-cluster coupling, and a transition to a low-temperature phase that has long-range order evidenced by a finite domain wall tension.
Keywords
Cite
@article{arxiv.1407.5868,
title = {Magnetism in Rare Earth Quasicrystals: RKKY Interactions and Ordering},
author = {Stefanie Thiem and J. T. Chalker},
journal= {arXiv preprint arXiv:1407.5868},
year = {2015}
}
Comments
restructuring of paper and update of numerical results, 5 pages, 4 figures