Frustration-induced insulating chiral spin state in itinerant triangular-lattice magnets
Strongly Correlated Electrons
2010-11-22 v2
Abstract
We study the double-exchange model at half-filling with competing superexchange interactions on a triangular lattice, combining exact diagonalization and Monte-Carlo methods. We find that in between the expected itinerant ferromagnetic and Yafet-Kittel phases a robust scalar-chiral, insulating spin state emerges. At finite temperatures the ferromagnet - scalar-chiral quantum critical point is characterized by anomalous bad-metal behavior in charge transport as observed in frustrated itinerant magnets RMoO.
Cite
@article{arxiv.1007.2278,
title = {Frustration-induced insulating chiral spin state in itinerant triangular-lattice magnets},
author = {Sanjeev Kumar and Jeroen van den Brink},
journal= {arXiv preprint arXiv:1007.2278},
year = {2010}
}
Comments
4+ pages, published version