TY - JOUR
T1 - Phase diagram of S = 1 bond-alternating XXZ chains
AU - Kitazawa, Atsuhiro
AU - Nomura, Kiyohide
AU - Okamoto, Kiyomi
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1996/5/20
Y1 - 1996/5/20
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.76.4038
DO - 10.1103/PhysRevLett.76.4038
M3 - Article
AN - SCOPUS:4043099552
VL - 76
SP - 4038
EP - 4041
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 21
ER -