Magnetization curve of the kagome-strip-lattice antiferromagnet
Magnetization curve of the kagome-strip-lattice antiferromagnet
复制标题
kagome带晶格反铁磁体的磁化曲线
DOI：
10.1007/s10909-012-0701-9
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发表时间：
2013
影响因子：
2
通讯作者：
T. Shimokawa
中科院分区：
文献类型：
--
作者：
H. Kikuchi;H. Nakata;Y. Fujii;T. Taniguchi;T. Shimokawa
研究了拟一维与二维Kagome晶格内部具有相同晶格结构的Kagome-strip晶格上Heisenberg模型的磁化曲线。基于密度矩阵重整化群法的数值计算表明，系统在零磁化和饱和磁化之间存在多个磁化平台；在这=1/2的情况下，我们发现磁平台的高度为饱和形式=1,2,3,4,5和6的磁平台的存在，而在这=1的情况下，我们只检测到n=1,3,5和6的磁平台。在n=2,4和6的情况下，对于这些=1/2的系统，Oshikawa-Yamanaka-Affleck条件表明发生平移对称破缺（TSB）。我们在局部磁化的结果中数值证实了这个非平凡的TSB。在二维Kagome模型中，我们也发现宏观跃迁出现在饱和场附近，与自旋振幅无关。
We study the magnetization curve of the Heisenberg model on the quasi-one-dimensional Kagome-strip lattice that shares the same lattice structure in the inner part with the two-dimensional Kagome lattice. Our numerical calculations based on the density matrix renormalization group method reveal that the system shows several magnetization plateaus between zero magnetization and the saturated one; we find the presence of the magnetic plateaus with then/7 height of the saturation forn=1,2,3,4,5 and 6 in theS=1/2 case, whereas we detect only the magnetic plateaus ofn=1,3,5 and 6 in theS=1 case. In the cases ofn=2,4 and 6 for theS=1/2 system, the Oshikawa-Yamanaka-Affleck condition suggests the occurrence of the translational symmetry breaking (TSB). We numerically confirm this non-trivial TSB in our results of local magnetizations. We have also found that the macroscopic jump appears near the saturation field irrespective of the spin amplitude as well as the two-dimensional Kagome model.