Vortex Crystals with Chiral Stripes in Itinerant Magnets
Strongly Correlated Electrons
2016-09-26 v1
Abstract
We study noncoplanar magnetic ordering in frustrated itinerant magnets. For a family of Kondo square lattice models with classical local moments, we find that a double- noncoplanar vortex crystal has lower energy than the single- helical order expected from the Ruderman-Kittel-Kasuya-Yosida interaction whenever the lattice symmetry dictates four global maxima in the bare magnetic susceptibility. By expanding in the small Kondo exchange and the degree of noncoplanarity, we demonstrate that this noncoplanar state arises from a Fermi surface instability, and it is generic for a wide range of electron filling fractions whenever the two ordering wave vectors connect independent sections of the Fermi surface.
Cite
@article{arxiv.1510.06830,
title = {Vortex Crystals with Chiral Stripes in Itinerant Magnets},
author = {Ryo Ozawa and Satoru Hayami and Kipton Barros and Gia-Wei Chern and Yukitoshi Motome and Cristian D. Batista},
journal= {arXiv preprint arXiv:1510.06830},
year = {2016}
}
Comments
5 pages, 4 figures