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Evidence of a spin liquid phase in the frustrated honeycomb lattice

By D. C. Cabra, C. A. Lamas and H. D. Rosales

Abstract

In the present paper we present some new data supporting the existence of a spin-disordered phase in the Heisenberg model on the honeycomb lattice with antiferromagnetic interactions up to third neighbors along the line J2=J3, predicted in [Phys. Rev. B 83, 094506 (2011)]. We use the Schwinger boson technique followed by a mean field decoupling and exact diagonalization for small systems to show the existence of an intermediate phase with a spin gap and short range N\'eel correlations in the strong quantum limit (S=1/2).Comment: 6 pages, to be published in Modern Physics Letters

Topics: Condensed Matter - Strongly Correlated Electrons
Year: 2011
DOI identifier: 10.1142/S0217984911026590
OAI identifier: oai:arXiv.org:1103.5888
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