Frustration-induced quantum phases in mixed spin chain with frustrated side chains
Frustration-induced quantum phases in mixed spin chain with frustrated side chains
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DOI：
10.1103/physrevb.78.064407
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发表时间：
2008-05
影响因子：
3.7
通讯作者：
K. Hida;K. Takano
中科院分区：
文献类型：
--
作者：
K. Hida;K. Takano
通过数值和微扰计算研究了具有受挫侧链的混合海森堡自旋链。在传统的 Lieb-Mattis 型亚铁磁相或非磁性单线态簇固相附近发现了受挫诱导的量子部分极化亚铁磁相和非磁性自旋四极相。部分极化的亚铁磁相具有不相称的自旋结构。类似的结构常见于其他挫败引起的部分极化亚铁磁相中。数值结果还表明，如果侧链与主链的旋转弱耦合，则在高度受挫状态下会出现一系列几乎临界的非磁性基态。
A mixed Heisenberg spin chain with frustrated side chains is investigated by numerical and perturbational calculations. A frustration-induced quantum partially polarized ferrimagnetic phase and a nonmagnetic spin quadrupolar phase are found adjacent to the conventional Lieb-Mattis type ferrimagnetic phase or the nonmagnetic singlet cluster solid phases. The partially polarized ferrimagnetic phase has an incommensurate spin structure. Similar structures are commonly found in other frustration-induced partially polarized ferrimagnetic phases. Numerical results also suggest a series of almost critical nonmagnetic ground states in a highly frustrated regime if the side chain spins weakly couple to the main chain.