Spontaneous trimerization in a bilinear-biquadratic S=1 zig-zag chain

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dc.creatorCorboz, Philippe
dc.creatorLaeuchli, Andreas M.
dc.creatorTotsuka, Keisuke
dc.creatorTsunetsugu, Hirokazu
dc.date2007-07-09
dc.date2008-01-21
dc.date.accessioned2026-07-07T08:55:12Z
dc.date.available2026-07-07T08:55:12Z
dc.descriptionRecent theoretical studies raised the possibility of a realization of spin nematic states in the S=1 triangular lattice compound NiGa_2S_4. We study the bilinear-biquadratic spin 1 chain in a zig-zag geometry by means of the density matrix renormalization group method and exact diagonalization. We present the phase diagram focusing on antiferromagnetic interactions. Adjacent to the known Haldane-double Haldane and the extended critical phase with dominant spin nematic correlations we find a trimerized phase with a nonvanishing energy gap. We discuss results for different order parameters, energy gaps, correlation functions, and the central charge, and make connection to field theoretical predictions for the phase diagram.
dc.description5 pages, 6 figures, corrected typos
dc.identifierhttps://arxiv.org/abs/0707.1195
dc.identifierhttp://arxiv.org/abs/0707.1195
dc.identifierPhys. Rev. B 76, 220404(R) (2007)
dc.identifierdoi:10.1103/PhysRevB.76.220404
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/146198
dc.subjectStrongly Correlated Electrons
dc.subjectStatistical Mechanics
dc.titleSpontaneous trimerization in a bilinear-biquadratic S=1 zig-zag chain
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