Switchable Quantum Anomalous Hall state in a strongly frustrated lattice magnet
Strongly Correlated Electrons
2015-06-04 v1
Abstract
We establish that the interplay of itinerant fermions with localized magnetic moments on a checkerboard lattice leads to magnetic flux-phases. For weak itineracy the flux-phase is coplanar and the electronic dispersion takes the shape of graphene-like Dirac fermions. Stronger itineracy drives the formation of a non-coplanar, chiral flux-phase, in which the Dirac fermions acquire a topological mass that is proportional to a ferromagnetic spin polarization. Consequently the system self-organizes into a ferromagnetic Quantum Anomalous Hall state in which the direction of its dissipationless edge-currents can be switched by an applied magnetic field.
Keywords
Cite
@article{arxiv.1202.3340,
title = {Switchable Quantum Anomalous Hall state in a strongly frustrated lattice magnet},
author = {Jörn W. F. Venderbos and Maria Daghofer and Jeroen van den Brink and Sanjeev Kumar},
journal= {arXiv preprint arXiv:1202.3340},
year = {2015}
}
Comments
4.5 pages, 3 figures