Real-space perturbation theory for frustrated magnets: application to magnetization plateaus

Abstract

We present a unified approach to the problem of degeneracy lifting in geometrically frustrated magnets with and without an external field. The method treats fluctuations around a classical spin configuration in terms of a real-space perturbation expansion. We calculate two lowest-order contributions for the Heisenberg spin Hamiltonian and use them to study the magnetization processes of spin-$S$ triangular and kagomé antiferromagnets.

8 pages, 3 figures

References in corpus (11)

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Cited by in corpus (13)

• Order by quenched disorder in the model triangular antiferromagnet RbFe(MoO4)2
• Magnetization Process of the Spin-S Kagome-Lattice Heisenberg Antiferromagnet
• Topological Hybrids of Magnons and Magnon Bound Pairs
• Ground state selection by magnon interactions in the fcc antiferromagnet
• Magnon interactions in the quantum paramagnetic phase of CoNb${}_2$O${}_6$
• Anisotropic exchange and non-collinear antiferromagnets on a noncentrosymmetric fcc structure as in the half-Heuslers
• Proximity-induced sequence of field transitions in Kitaev candidate BaCo${}_2$(AsO${}_4$)${}_2$
• Quantum selection of order and dynamic properties of Kitaev-Heisenberg ferromagnet on a triangular lattice
• Fully-frustrated octahedral antiferromagnets: emergent complexity in external field
• Self-consistent spin-wave analysis of the 1/3 magnetization plateau in the kagome antiferromagnet
• Programmable order by disorder effect and underlying phases through dipolar quantum simulators
• Robust semiclassical magnetization plateau in the kagome lattice
• Field-induced states and thermodynamics of the frustrated Heisenberg antiferromagnet on a square lattice