Home | deutsch  | Legals | Data Protection | Sitemap | KIT

Institute for Theoretical Condensed Matter physics

Karlsruhe Institute of Technology

Wolfgang-Gaede-Str. 1
D-76131 Karlsruhe

Phone: +49 721 608-43367
Fax: +49 721608-47779

http://www.tkm.kit.edu/

Classical ground states of Heisenberg and XY antiferromagnets on the windmill lattice

Classical ground states of Heisenberg and XY antiferromagnets on the windmill lattice
Author:

Bhilahari Jeevanesan, Peter P. Orth

Source:

Phys. Rev. B 90, 144435 (2014)

preprint: arXiv:1409.1618

Date: 31.10.2014

We investigate the classical Heisenberg and planar (XY) models on the windmill lattice. The windmill lattice is formed out of two widely occurring lattice geometries: a triangular lattice is coupled to its dual honeycomb lattice. Using a combination of iterative minimization, heat-bath Monte Carlo simulations and analytical calculations, we determine the complete ground state phase diagram of both models and find the exact energies of the phases. The phase diagram shows a rich phenomenology due to competing interactions and hosts, in addition to collinear and various coplanar phases, also intricate non-coplanar phases. We briefly outline different paths to an experimental realization of these spin models. Our extensive study provides a starting point for the investigation of quantum and thermal fluctuation effects.