Critical behavior in quantum spin chains with composite spin

J. Sólyom, J. Timonen

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Composite spin models are constructed such that, by varying two parameters, they interpolate between the spin-(1/2 antiferromagnetic Heisenberg chain and a number of spin-1 models. These include the usual Heisenberg model, the integrable spin-1 model, and the model with an exact valence-bond ground state. Finite-chain calculations are performed on the composite spin model to study its criticality, and to find if the integrable spin-1 model is a multicritical point with a finite gap generated away from it. We find indications for an extended gapless region.

Original languageEnglish
Pages (from-to)7003-7008
Number of pages6
JournalPhysical Review B
Volume39
Issue number10
DOIs
Publication statusPublished - 1989

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  • Condensed Matter Physics

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Critical behavior in quantum spin chains with composite spin. / Sólyom, J.; Timonen, J.

In: Physical Review B, Vol. 39, No. 10, 1989, p. 7003-7008.

Research output: Contribution to journalArticle

Sólyom, J. ; Timonen, J. / Critical behavior in quantum spin chains with composite spin. In: Physical Review B. 1989 ; Vol. 39, No. 10. pp. 7003-7008.
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