Quantum phase transition in easy-axis antiferromagnetic integer-spin chains

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dc.creatorCapone, M.
dc.creatorCaprara, S.
dc.creatorCataldi, L.
dc.date2003-07-11
dc.date.accessioned2026-07-07T02:52:17Z
dc.date.available2026-07-07T02:52:17Z
dc.descriptionAntiferromagnetic Heisenberg integer-spin chains are characterized by a spin-liquid ground state with no long-range order, due to the relevance of quantum fluctuations. Spin anisotropy, however, freezes quantum fluctuations, and the system is magnetized in the presence of a sufficiently large easy-axis anisotropy. We numerically investigate the case S=1, by means of the density-matrix renormalization group, and find that the freezing of the spin liquid into a Néel spin solid, with increasing easy-axis anisotropy, is a continuous quantum phase transition. Numerical evidence indicates that the transition is not in the two-dimensional Ising universality class.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0307266
dc.identifierhttp://arxiv.org/abs/cond-mat/0307266
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/21786
dc.subjectStrongly Correlated Electrons
dc.titleQuantum phase transition in easy-axis antiferromagnetic integer-spin chains
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