Anisotropic spin model of strong spin-orbit-coupled triangular antiferromagnets
By Yaodong Li, Xiaoqun Wang, Gang Chen. 2015
151 citations recorded by the source corpus.
Motivated by the recent experimental progress on the strong spin-orbit-coupled rare-earth triangular antiferromagnet, we analyze the highly anisotropic spin model that describes the interaction between the spin-orbit-entangled Kramers' doublet local moments on the triangular lattice. We apply the Luttinger-Tisza method, the classical Monte Carlo simulation, and the self-consistent spin wave theory to analyze the anisotropic spin Hamiltonian. The classical phase diagram includes the ${120}^{\ensuremath{\circ}}$ state and two distinct stripe-ordered phases. The frustration is very strong and significantly suppresses the ordering temperature in the regimes close to the phase boundary between two ordered phases. Going beyond the semiclassical analysis, we include the quantum fluctuations of the spin moments within a self-consistent Dyson-Maleev spin-wave treatment. We find that the strong quantum fluctuations melt the magnetic order in the frustrated regions. We explore the magnetic excitations in the three different ordered phases as well as in strong magnetic fields. Our results provide a guidance for the future theoretical study of the generic model and are broadly relevant for strong spin-orbit-coupled triangular antiferromagnets such as ${\mathrm{YbMgGaO}}_{4}, {\mathrm{RCd}}_{3}{\mathrm{P}}_{3}, {\mathrm{RZn}}_{3}{\mathrm{P}}_{3}, {\mathrm{RCd}}_{3}{\mathrm{As}}_{3}, {\mathrm{RZn}}_{3}{\mathrm{As}}_{3}$, and ${\mathrm{R}}_{2}{\mathrm{O}}_{2}{\mathrm{CO}}_{3}$.
Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/b314c18d829354e75d825cdb40c4ef27832ce691
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In Condensed Matter Physics
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Rare-Earth Chalcogenides: A Large Family of Triangular Lattice Spin Liquid Candidates (2018, background): “As mentioned above, there is a long list of rare-earth magnets [20, 45, 47].”
- Valence Bonds in Random Quantum Magnets: Theory and Application to YbMgGaO4 (2017, background): “The question of the exact form of the Hamiltonian has not been fully settled [5,8,11,14,173].”