Phase diagram of S = 1 bond-alternating XXZ chains

Atsuhiro Kitazawa, Kiyohide Nomura, Kiyomi Okamoto

Research output: Contribution to journalArticlepeer-review

71 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 Z2 × Z2 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

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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