TY - JOUR
T1 - Phase diagram of S=12 two-leg XXZ spin-ladder systems
AU - Hijii, Keigo
AU - Kitazawa, Atsuhiro
AU - Nomura, Kiyohide
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2005
Y1 - 2005
N2 - We investigate the ground-state phase diagram of the S=12 two-leg XXZ spin-ladder system with an isotropic interchain coupling. In this model, there is the Berezinskii-Kosterlitz-Thouless transition which occurs at the XY-Haldane and XY-rung singlet phase boundaries. It was difficult to determine the transition line using traditional methods. We overcome this difficulty using the level spectroscopy method combined with the twisted boundary condition method, and we check the consistency. We find out that the phase boundary between XY phase and Haldane phase lies on Δ=0 line. And we show that there exist two different XY phases, which we can distinguish investigating a XX correlation function.
AB - We investigate the ground-state phase diagram of the S=12 two-leg XXZ spin-ladder system with an isotropic interchain coupling. In this model, there is the Berezinskii-Kosterlitz-Thouless transition which occurs at the XY-Haldane and XY-rung singlet phase boundaries. It was difficult to determine the transition line using traditional methods. We overcome this difficulty using the level spectroscopy method combined with the twisted boundary condition method, and we check the consistency. We find out that the phase boundary between XY phase and Haldane phase lies on Δ=0 line. And we show that there exist two different XY phases, which we can distinguish investigating a XX correlation function.
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U2 - 10.1103/PhysRevB.72.014449
DO - 10.1103/PhysRevB.72.014449
M3 - Article
AN - SCOPUS:33749159033
VL - 72
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 1098-0121
IS - 1
M1 - 014449
ER -