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首页> 外文期刊>Physical review >Data-driven determination of the spin Hamiltonian parameters and their uncertainties: The case of the zigzag-chain compound KCu_4P_3O_(12)
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Data-driven determination of the spin Hamiltonian parameters and their uncertainties: The case of the zigzag-chain compound KCu_4P_3O_(12)

机译：数据驱动的旋转哈密顿参数的确定及其不确定性：Z字形链复合KCU_4P_3O_（12）的情况

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摘要

We propose a data-driven technique to estimate the spin Hamiltonian. including uncertainty, from multiple physical quantities. Using our technique, an effective model of KCu_4P_3O_(12) is determined from the experimentally observed magnetic susceptibility and magnetization curves with various temperatures under high magnetic fields. An effective model, which is the quantum Heisenberg model on a zigzag chain with eight spins having J_1 = -8.54 ±0.51 meV, J_2 = -2.67 ± 1.13 meV, J_3 = -3.90 ±0.15 meV, and J_4 = 6.24± 0.95 meV. describes these measured results well. These uncertainties are successfully determined by the noise estimation. The relations among the estimated magnetic interactions or physical quantities are also discussed. The obtained effective model is useful to predict hard-to-measure properties such as spin gap. spin configuration at the ground state, magnetic specific heat, and magnetic entropy.
机译：我们提出了一种数据驱动的技术来估计自旋哈密顿人。包括不确定性，来自多种物理量。使用我们的技术，从实验观察到的磁磁敏感和磁化曲线具有在高磁场下的各种温度的磁化率和磁化曲线确定有效型号的KCU_4P_3O_（12）。一种有效模型，它是Zigag链条上的量子Heisenberg模型，其中八个旋转，具有J_1 = -8.54±0.51 MEV，J_2 = -2.67±1.13 MEV，J_3 = -3.90±0.15 MEV，J_4 = 6.24±0.95 MEV。描述这些测量结果良好。这些不确定性由噪声估计成功确定。还讨论了估计的磁相互作用或物理量之间的关系。所获得的有效模型可用于预测诸如旋转间隙的难以测量的性质。在接地状态下旋转配置，磁性比热和磁熵。

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  • 来源
    《Physical review》 |2020年第22期|224435.1-224435.9|共9页
  • 作者

    Ryo Tamura; Koji Hukushima; Akira Matsuo; Koichi Kindo; Masashi Hase;

  • 作者单位

    International Center for Materials Nanoarchitectonics (WPI-MANA) National Institute for Materials Science Tsukuba 305-0044 Japan Research and Services Division of Materials Data and Integrated System National Institute for Materials Science Tsukuba 305-0044 Japan Graduate School of Frontier Sciences The University of Tokyo Chiba 277-8561 Japan;

    Komaba Institute for Science The University of Tokyo Tokyo 153-8902 Japan Department of Basic Science Graduate School of Arts and Sciences The University of Tokyo Tokyo 153-8902 Japan Research and Services Division of Materials Data and Integrated System National Institute for Materials Science Tsukuba 305-0044 Japan;

    The Institute for Solid State Physics The University of Tokyo Chiba 277-8581 Japan;

    The Institute for Solid State Physics The University of Tokyo Chiba 277-8581 Japan;

    Research Center for Advanced Measurement and Characterization National Institute for Materials Science Tsukuba 305-0047 Japan;

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