Spin-Wave Theory and its Applications to Neutron Scattering and THz Spectroscopy
Spin-Wave Theory and its Applications to Neutron Scattering and THz Spectroscopy
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自旋波理论及其在中子散射和太赫兹光谱中的应用
DOI：
10.1088/978-1-64327-114-9
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
J. Fernandez
中科院分区：
文献类型：
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作者：
R. Fishman;J. Fernandez
用于研究磁性材料的两个最有力的工具是非弹性中子散射和太赫兹光谱。由于测量的光谱提供了磁性材料的动态指纹，这些工具使科学家能够解开复杂磁性状态的结构，并确定产生它们的微观相互作用。这本书讨论了非弹性中子散射和太赫兹光谱学的实验技术，并提供了使用自旋波理论分析它们的测量所需的理论工具。对于大多数材料，这种分析可以解决微观磁相互作用，如交换，各向异性和Dzyaloshinskiii-Moriya相互作用。假设在基本的统计力学背景和熟悉的量子化谐振子，这本书提出了一个全面的审查自旋波理论及其应用，以非弹性中子散射和太赫兹光谱。自旋波理论用于研究几种模型磁系统，包括非共线磁体，如由几何挫折，竞争交换相互作用或Dzyaloshinskiii-Moriya相互作用产生的螺旋和摆线。几个案例研究利用自旋波理论分析非弹性中子散射和太赫兹光谱测量。这些包括单晶和粉末以及氧化物和分子基磁体。除了概述用于拟合基于微观模型的动力学谱的数值技术外，这本书还包含了70多个练习，可以由刚开始的研究生进行。
Two of the most powerful tools used to study magnetic materials are inelastic neutron scattering and THz spectroscopy. Because the measured spectra provide a dynamical fingerprint of a magnetic material, those tools enable scientists to unravel the structure of complex magnetic states and to determine the microscopic interactions that produce them. This book discusses the experimental techniques of inelastic neutron scattering and THz spectroscopy and provides the theoretical tools required to analyze their measurements using spin-wave theory. For most materials, this analysis can resolve the microscopic magnetic interactions such as exchange, anisotropy, and Dzyaloshinskii–Moriya interactions. Assuming a background in elementary statistical mechanics and a familiarity with the quantized harmonic oscillator, this book presents a comprehensive review of spin-wave theory and its applications to both inelastic neutron scattering and THz spectroscopy. Spin-wave theory is used to study several model magnetic systems, including non-collinear magnets such as spirals and cycloids that are produced by geometric frustration, competing exchange interactions, or Dzyaloshinskii–Moriya interactions. Several case studies utilizing spin-wave theory to analyze inelastic neutron-scattering and THz spectroscopy measurements are presented. These include both single crystals and powders and both oxides and molecule-based magnets. In addition to sketching the numerical techniques used to fit dynamical spectra based on microscopic models, this book also contains over 70 exercises that can be performed by beginning graduate students.
DOI：
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发表时间：
2020
期刊：
影响因子：
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作者：
Kobayashi Koji;Takagaki Masaki;Nomura Kentaro;R. Yoshii and H. Hayakawa;池田 正弘;Chang-Tse Hsieh
通讯作者：
Chang-Tse Hsieh