强关联电子系统的MIEZE中子自旋回波谱
MIEZE Neutron Spin-Echo Spectroscopy of Strongly Correlated Electron Systems
摘要：
本文综述了近几年来利用零效应强度纵向调制（MIEZE）技术研究中子自旋回波谱的新进展。关键的技术特点进行了总结，突出的参数范围内访问的动量和能量，以及其局限性，是非常好的理解和控制。给出了典型的实验数据，包括准弹性和非弹性散射，其中包括Ho_2Ti_2O_7中的磁弹耦合和晶场激发，MnSi中的skyrmion晶格在外加磁场下的顺磁跃迁，Fe中的铁磁临界和自旋波。此外，基准研究的分子动力学在水的报告。总的来说，MIEZE光谱学在中小动量转移研究中的优势包括超过七个数量级的非常宽的动态范围，对去极化样品或去极化样品环境以及非相干散射材料进行直接研究的能力。
英文摘要：
Recent progress in neutron spin-echo spectroscopy by means of longitudinal Modulation of IntEnsity with Zero Effort (MIEZE) is reviewed. Key technical characteristics are summarized which highlight that the parameter range accessible in momentum and energy, as well as its limitations, are extremely well understood and controlled. Typical experimental data comprising quasi-elastic and inelastic scattering are presented, featuring magneto-elastic coupling and crystal field excitations in Ho2Ti2O7, the skyrmion lattice to paramagnetic transition under applied magnetic field in MnSi, ferromagnetic criticality and spin waves in Fe. In addition bench marking studies of the molecular dynamics in H2O are reported. Taken together, the advantages of MIEZE spectroscopy in studies at small and intermediate momentum transfers comprise an exceptionally wide dynamic range of over seven orders of magnitude, the capability to perform straight forward studies on depolarizing samples or under depolarizing sample environments, as well as on incoherently scattering materials.
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