Phase diagram of S = 1 bond-alternating XXZ chains

Atsuhiro Kitazawa, Kiyohide Nomura, Kiyomi Okamoto

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

Phase transitions between the XY, the dimer, and the Haldane phases of the spin-1 bond-alternating XXZ chain are studied numerically. By use of the “level spectroscopy” we overcome the difficulties in treating the Berezinskii-Kosterlitz-Thouless transition which occurs at the XY-dimer and XY-Haldane boundaries. We find that the XY-Haldane boundary lies just on Δ = 0 (pure XY line). The critical properties can be interpreted as the Ashkin-Teller type reflecting the hidden Z 2 × Z 2 symmetry. We make a conjecture on the phase diagram of the present model for arbitrary S.

Original languageEnglish
Pages (from-to)4038-4041
Number of pages4
JournalPhysical Review Letters
Volume76
Issue number21
DOIs
Publication statusPublished - May 20 1996
Externally publishedYes

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dimers
phase diagrams
symmetry
spectroscopy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Phase diagram of S = 1 bond-alternating XXZ chains. / Kitazawa, Atsuhiro; Nomura, Kiyohide; Okamoto, Kiyomi.

In: Physical Review Letters, Vol. 76, No. 21, 20.05.1996, p. 4038-4041.

Research output: Contribution to journalArticle

Kitazawa, Atsuhiro ; Nomura, Kiyohide ; Okamoto, Kiyomi. / Phase diagram of S = 1 bond-alternating XXZ chains. In: Physical Review Letters. 1996 ; Vol. 76, No. 21. pp. 4038-4041.
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