论文标题
各向异性$ s = 1 $旋转链[ni（hf $ _2 $）（3-clpyridine）$ _ 4 $] bf $ _4 $
Inelastic neutron scattering study of the anisotropic $S = 1$ spin chain [Ni(HF$_2$)(3-Clpyridine)$_4$]BF$_4$
论文作者
论文摘要
[ni（hf $ _2 $）（3-clpyridine）$ _ 4 $] bf $ _4 $（nbct）是一维的，$ s = 1 $ spin链材料，没有磁性中子bragg峰值降低0.1 k的温度为0.1 k。 Paramagnet阶段（QPM），其中$ d $是轴向单离子各向异性，$ j $是Intrach superexchange。在此，在部分剥离中呈现非弹性中子散射结果，$^{11} $ b在零磁场中富含NBCT多晶样品，并降低为0.3 K的温度。与密度矩阵重质量重新分配组的比较相比$ e/j \大约0.05 $）。这些$ d $，$ j $和$ e $ values将nbct放置在QPM阶段，但在量子相过渡到远距离有序阶段的速度急剧上。
[Ni(HF$_2$)(3-Clpyridine)$_4$]BF$_4$ (NBCT) is a one-dimensional, $S = 1$ spin chain material that shows no magnetic neutron Bragg peaks down temperatures of 0.1 K. Previous work identified NBCT to be in the Haldane phase and near a quantum phase transition as a function of $D/J$ to the large-$D$ quantum paramagnet phase (QPM), where $D$ is the axial single-ion anisotropy and $J$ is the intrachain superexchange. Herein, inelastic neutron scattering results are presented on partially deuterated, $^{11}$B enriched NBCT polycrystalline samples in zero magnetic field and down to temperatures of 0.3 K. Comparison to density matrix renormalization group calculations yields $D/J = 1.51$ and a significant rhombic single-ion anisotropy $E$ ($E/D \approx 0.03$, $E/J \approx 0.05$). These $D$, $J$, and $E$ values place NBCT in the large-$D$ QPM phase but precipitously near a quantum phase transition to a long-range ordered phase.
