Spin phonon induced colinear order and magnetization plateaus in triangular and kagome antiferromagnets. Applications to CuFeO_2

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dc.creatorWang, Fa
dc.creatorVishwanath, Ashvin
dc.date2007-09-24
dc.date.accessioned2026-07-07T09:21:38Z
dc.date.available2026-07-07T09:21:38Z
dc.descriptionCoupling between spin and lattice degrees of freedom are important in geometrically frustrated magnets where they can lead to degeneracy lifting and novel orders. We show that moderate spin-lattice couplings in triangular and Kagome antiferromagnets can induce complex colinear magnetic orders. When classical Heisenberg spins on the triangular lattice are coupled to Einstein phonons, a rich variety of phases emerge, including the experimentally observed four sublattice state and the five sublattice 1/5th plateau state seen in the magneto-electric material CuFeO$_2$. In addition we predict magnetization plateaus at 1/3, 3/7, 1/2, 3/5 and 5/7 at these couplings. Strong spin-lattice couplings induce a striped colinear state, seen in $α$-NaFeO$_2$ and MnBr$_2$. On the Kagome lattice, moderate spin-lattice couplings induce colinear order, but an extensive degeneracy remains.
dc.description5 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0709.3546
dc.identifierhttp://arxiv.org/abs/0709.3546
dc.identifierPhys. Rev. Lett. 100, 077201 (2008)
dc.identifierdoi:10.1103/PhysRevLett.100.077201
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/155095
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleSpin phonon induced colinear order and magnetization plateaus in triangular and kagome antiferromagnets. Applications to CuFeO_2
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