Berezinskii-Kosterlitz-Thouless Transition of Spin-1 XXZ Chains in a Staggered Magnetic Field
Berezinskii-Kosterlitz-Thouless Transition of Spin-1 XXZ Chains in a Staggered Magnetic Field
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交错磁场中 Spin-1 XXZ 链的 Berezinskii-Kosterlitz-Thouless 转变
DOI：
10.1143/jpsj.67.302
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
K. Nomura
中科院分区：
文献类型：
--
作者：
Masayoshi Tsukano;K. Nomura
用数值方法得到了交错磁场下S = 1xxz链的相图。用能级谱法研究了XY相与反铁磁相之间的berezinski - kosterlitz - thouless跃迁。此外，我们发现霍尔丹相和反铁磁相之间没有区别，因为与S =1/2的情况相反，高斯临界线没有出现。预计不仅在霍尔丹相中，而且在反铁磁相中也存在一些隐藏的z2 × z2对称性破缺。
Phase diagram of S =1 XXZ chain in a staggered magnetic field is obtained numerically. The Berezinskii-Kosterlitz-Thouless transition between the XY and the antiferromagnetic phases is studied by the level-spectroscopy. Moreover we find that there is no distinction between the Haldane and the antiferromagnetic phases, since the Gaussian critical line does not appear, in contrast to the S =1/2 case. It is expected that some hidden Z 2 × Z 2 symmetry breaking happens not only in the Haldane phase but also in the antiferromagnetic one.