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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Honeycomb-Lattice Heisenberg-Kitaev Model in a Magnetic Field: Spin Canting, Metamagnetism, and Vortex Crystals

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Janssen, Lukas ; Andrade, Eric C. ; Vojta, Matthias
Total Authors: 3
Document type: Journal article
Source: Physical Review Letters; v. 117, n. 27 DEC 30 2016.
Web of Science Citations: 35

The Heisenberg-Kitaev model is a paradigmatic model to describe the magnetism in honeycomb-lattice Mott insulators with strong spin-orbit coupling, such as A(2)IrO(3) (A = Na, Li) and alpha-RuCl3. Here, we study in detail the physics of the Heisenberg-Kitaev model in an external magnetic field. Using a combination of Monte Carlo simulations and spin-wave theory, we map out the classical phase diagram for different directions of the magnetic field. Broken SU(2) spin symmetry renders the magnetization process rather complex, with sequences of phases and metamagnetic transitions. In particular, we find various large-unit-cell and multi-Q phases including a vortex-crystal phase for a field in the {[}111] direction. We also discuss quantum corrections in the high-field phase. (AU)

FAPESP's process: 13/00681-8 - Disordered magnets: ground state, excitations, and thermodynamics
Grantee:Eric de Castro e Andrade
Support type: Research Grants - Young Investigators Grants