Phase diagram of the frustrated spin-1/2 Heisenberg antiferromagnet with cyclic-exchange interaction

Andrey Chubukov, Eduardo Gagliano, Carlos Balseiro

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43 Scopus citations

Abstract

We study the effect of four-spin cyclic-exchange interactions on the magnetic properties of the spin-1/2 Heisenberg antiferromagnetic on a two-dimensional square lattice with the two-spin interactions between nearest and next-nearest neighbors. We found that the four-spin exchange competes with the effects of frustration and this competition leads to a very rich phase diagram. We use the standard spin-wave formalism, the perturbative expansions around various dimerized states and finite-cluster calculations to study the locations of different phases of the model. The phase diagram in the frustration-cyclic exchange plane involves two collinear phases [(,) and (0,)], three canted states, and two different dimerized configurations.

Original languageEnglish (US)
Pages (from-to)7889-7898
Number of pages10
JournalPhysical Review B
Volume45
Issue number14
DOIs
StatePublished - Jan 1 1992

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