论文标题
在量子临界点附近磁铁的总矩总规则
Total Moment Sum Rule for Magnets in the Vicinity of Quantum Critical Point
论文作者
论文摘要
众所周知，在量子磁系统的有序阶段，纵向和横向激发模式可以存在于量子临界点附近。此类系统的总矩总规则是基于扩展的自旋波理论得出的，其中考虑了纵向和横向磁激励。总和规则被解析为弹性，一块和两麦克农的组件。该公式适用于具有纵向模式的自旋系统，例如$ s = 1 $的系统，具有易于平面类型和自旋二聚体系统的单离子各向异性。结果有助于我们分析和理解未弹性中子散射的测量数据。
It is known that the longitudinal and transverse excitation modes can exist in the vicinity of a quantum critical point in the ordered phase of quantum magnetic systems. The total moment sum rule for such systems is derived on the basis of the extended spin-wave theory, where both longitudinal and transverse magnetic excitations are taken into account. The sum rule is resolved into elastic, one-magnon, and two-magnon components. The formulation is applicable to spin systems with the longitudinal mode, such as $S=1$ systems with single-ion anisotropy of easy-plane type and spin dimer systems. The result helps us analyze and understand measured data of inelastic neutron scattering.
