论文标题
各向异性$ s = 1 $旋转链[ni（hf $ _2 $）（3-clpyradine）$ _ 4 $] bf $ _4 $
High-pressure inelastic neutron scattering study of the anisotropic $S=1$ spin chain [Ni(HF$_2$)(3-Clpyradine)$_4$]BF$_4$
论文作者
论文摘要
[ni（hf $ _2 $）（3-clpyradine）$ _ 4 $] bf $ _4 $（NBCT）是一维（1-D），$ s = 1 $旋转链材料，没有显示长距离磁性顺序，显示出远距离的磁力降低到0.1 k的温度计温度下0.1 k的温度值。 $ d/j $相图，其中$ d $是轴向单离子各向异性，$ j $是Intrach superexchange。在这里，我们将先前的实验扩展到0.9 GPA的静水压力。通过与密度矩阵重归其化组计算相比，我们发现$ d/j $从1.5增加到3.2，随着压力从0 GPA增加到0.9 GPA，这将系统进一步将系统推向大$ D $相位。
[Ni(HF$_2$)(3-Clpyradine)$_4$]BF$_4$ (NBCT) is a one-dimensional (1-D), $S=1$ spin chain material that shows no long-range magnetic order down to thermometer temperatures of 0.1 K. Previous ambient pressure inelastic neutron scattering experiments identified NBCT to be in the large-$D$ quantum paramagnetic phase of the $D/J$ phase diagram, where $D$ is the axial single-ion anisotropy and $J$ is the intrachain superexchange. Here, we extend the previous experiments to be at a hydrostatic pressure of 0.9 GPa. By comparing to density matrix renormalization group calculations, we find $D/J$ increases from 1.5 to 3.2 as pressure increases from 0 GPa to 0.9 GPa, which pushes the system further into the large-$D$ phase.
