Quantum ferrimagnets

A. V. Chubukov, K. I. Ivanova, P. Ch Ivanov, E. R. Korutcheva

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

An instability of a ferromagnetic state in quantum spin systems induced by a two-particle bound-state condensation is shown to produce, for S>2, a ferrimagnetic ground state with a quantized (SZ=S-1) value of spontaneous magnetization per site. For low S, instead, the ground state below the instability has zero net magnetization, while a spontaneous symmetry breaking reveals itself in quadratic, cubic, or both quadratic and cubic correlations for S=1, 2 or 3/2, respectively. The role of quantum fluctuations and the reorientation process in a magnetic field are examined.

Original languageEnglish (US)
Article number006
Pages (from-to)2665-2677
Number of pages13
JournalJournal of Physics: Condensed Matter
Volume3
Issue number16
DOIs
StatePublished - Dec 1 1991

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