Massless phases of Haldane-gap antiferromagnets in a magnetic field

Gábor Fáth, Peter B. Littlewood

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21 Citations (Scopus)


The behavior of Haldane-gap antiferromagnets in a strong magnetic field is not universal. While the low-energy physics of the conventional one-dimensional spin-1 Heisenberg model in its magnetized regime is described by one incommensurate soft mode, other systems with somewhat perturbed coupling constants can possess two characteristic soft modes in a certain range of the field strength. Such a two-component Luttinger liquid phase is realized above the massive Haldane-gap phase, and in general above any massive nonmagnetic phase, when the ground state exhibits short-range incommensurate fluctuations already in the absence of the field.

Original languageEnglish
Pages (from-to)R14709-R14712
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number22
Publication statusPublished - Jan 1 1998


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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