Published in

American Physical Society, Physical Review Letters, 10(115)

DOI: 10.1103/physrevlett.115.107201

Links

Tools

Export citation

Search in Google Scholar

Three-Dimensional Crystallization of Vortex Strings in Frustrated Quantum Magnets

Journal article published in 2015 by Zhentao Wang ORCID, Yoshitomo Kamiya ORCID, Andriy H. Nevidomskyy, Cristian D. Batista
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

Full text: Download

Green circle
Preprint: archiving allowed
Upload
Green circle
Postprint: archiving allowed
Upload
Green circle
Published version: archiving allowed
Upload
Policy details
Data provided by SHERPA/RoMEO

Abstract

We demonstrate that frustrated exchange interactions can produce exotic 3D crystals of vortex strings near the saturation field (H=Hsat) of body- and face-centered cubic Mott insulators. The combination of cubic symmetry and frustration leads to a magnon spectrum of the fully polarized spin state (H>Hsat) with degenerate minima at multiple noncoplanar Q vectors. This spectrum becomes gapless at the quantum critical point H=Hsat and the magnetic ordering below Hsat can be formally described as a condensate of a dilute gas of bosons. By expanding in the lattice gas parameter, we find that different vortex crystals span sizable regions of the phase diagrams for isotropic exchange and are further stabilized by symmetric exchange anisotropy. ; Comment: 7 pages, 8 figures