论文标题
一致的非弹性中子散射，用于检测两旋磁相关
Coincidence inelastic neutron scattering for detection of two-spin magnetic correlations
论文作者
论文摘要
非弹性中子散射（INS）是一种研究磁性材料的低能单旋转动力学的强大技术。多种量子磁铁显示出新的磁相关性，例如量子自旋液体。这些新型的磁相关性超出了INS的直接检测。在本文中，我们提出了一种重合技术，即巧合中子散射（CINS），可以检测磁性材料的两旋磁相关性。在CINS中，有两个中子源和两个中子探测器，具有额外的巧合检测器。来自两个中子源的两个中子入射在目标磁性材料上，它们被磁性材料的电子旋转散射。这两个散射的中子是由两个中子检测器检测到的，与两旋抗盐盐波函数所描述的巧合概率一致。由于两旋盐盐波函数用激发两个旋转定义了动量分辨的动力波函数，因此CINS可以明确检测磁性材料的两翼磁相关性。因此，可以引入它来研究量子磁体的各种自旋价键态。
Inelastic neutron scattering (INS) is one powerful technique to study the low-energy single-spin dynamics of magnetic materials. A variety of quantum magnets show novel magnetic correlations such as quantum spin liquids. These novel magnetic correlations are beyond the direct detection of INS. In this paper we propose a coincidence technique, coincidence inelastic neutron scattering (cINS), which can detect the two-spin magnetic correlations of the magnetic materials. In cINS there are two neutron sources and two neutron detectors with an additional coincidence detector. Two neutrons from the two neutron sources are incident on the target magnetic material, and they are scattered by the electron spins of the magnetic material. The two scattered neutrons are detected by the two neutron detectors in coincidence with the coincidence probability described by a two-spin Bethe-Salpeter wave function. Since the two-spin Bethe-Salpeter wave function defines the momentum-resolved dynamical wave function with two spins excited, cINS can explicitly detect the two-spin magnetic correlations of the magnetic material. Thus, it can be introduced to study the various spin valence bond states of the quantum magnets.
