Spin gap in the weakly interacting quantum spin chain antiferromagnet KCuPO4・H2O
Spin gap in the weakly interacting quantum spin chain antiferromagnet KCuPO4・H2O
复制标题
弱相互作用量子自旋链反铁磁体KCuPO4·H2O中的自旋间隙
DOI：
10.1103/physrevb.107.054435
复制
发表时间：
2023
影响因子：
3.7
通讯作者：
Mitsuda S.
中科院分区：
文献类型：
--
作者：
Fujihala M.;Hagihala M.;Morita K.;Murai N.;Koda A.;Okabe H.;Mitsuda S.
海森堡线性链反铁磁体是最简单的自旋模型；尽管如此，它还是各种量子多体现象的平台。在这里，我们报告了准一维反铁磁体的磁性行为。 K 处出现每次自旋有序矩为 0.31(1) 的远程相应反铁磁有序。上面，非弹性中子激发的特征是两个自旋连续体。链内相互作用和链间相互作用估计分别为 172 和 4.25(4) K；因此比率。在较低能量下，在色散激发中观察到自旋间隙。这些结果与弱相互作用海森堡链系统中观察到的特征一致。
TheHeisenberg linear chain antiferromagnet is the simplest spin model; nevertheless it serves as a platform for various quantum many-body phenomena. Here, we report the magnetic behavior of a quasi-one-dimensional antiferromagnet. A long-range commensurate antiferromagnetic order with ordered moment 0.31(1)per spin occurs atK. Above, the inelastic neutron excitation is characterized by a two spinon continuum. The intrachain interactionand interchain interactionare estimated to be 172 and 4.25(4) K, respectively; thus the ratio of. At lower energies, below, a spin gap is observed in the dispersive excitations. These results are consistent with characteristics observed in a weakly interactingHeisenberg chain system.