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arXiv 2009.01680cond-mat.str-el
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双自旋磁关联探测的符合非弹性中子散射

Coincidence inelastic neutron scattering for detection of two-spin magnetic correlations

Yuehua Su, Shengyan Wang, Chao Zhang

摘要:

非弹性中子散射(INS)是研究磁性材料低能单自旋动力学的有力手段。各种量子磁体表现出新颖的磁关联,如量子自旋液体。在本文中,我们提出了一种符合技术,符合非弹性中子散射(cINS),它可以检测磁性材料的双自旋磁关联。在cINS中,有两个中子源和两个中子探测器以及附加的符合探测器。来自两个中子源的两个中子入射到目标磁性材料上,并且它们被磁性材料的电子自旋散射。这两个散射的中子被两个中子探测器探测到,符合由双自旋Bethe-Salpeter波函数描述的符合概率。由于双自旋Bethe-Salpeter波函数定义了双自旋激发的动量分辨动力学波函数,cINS可以明确地检测磁性材料的双自旋磁关联。因此,它可以用来研究量子磁体的各种自旋价键态。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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