Three-sublattice order in triangular- and Kagomé-lattice spin-half antiferromagnets

Rajiv R P Singh, David A. Huse

Research output: Contribution to journalArticle

237 Scopus citations

Abstract

We study the possibility of 3 × 3 antiferromagnetic order in the S=1/2 triangular- and Kagomé-lattice Heisenberg models. An Ising-like anisotropy is introduced into the Hamiltonian, which picks a pair of ground states out of the manifold of the classically ordered states. To study properties of the Heisenberg model, we develop series expansions around one ordered state. We find that the Kagomé-lattice model is disordered, whereas the triangular-lattice model is very close to the critical point for antiferromagnetism; if ordered, the latter has an order parameter much smaller than that predicted by spin-wave theory.

Original languageEnglish (US)
Pages (from-to)1766-1769
Number of pages4
JournalPhysical Review Letters
Volume68
Issue number11
DOIs
StatePublished - Jan 1 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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