发表机构
Beijing Institute of Technology; Beijing Normal University; Institute of High Energy Physics, Chinese Academy of Sciences（北京理工大学; 北京师范大学; 中国科学院高能物理研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究针对磁电相变动力学起源缺乏宏观理论的问题，基于轴子准粒子类凝聚过程，利用金兹堡-朗道框架推导相关关系并结合Dzyaloshinskii-Moriya相互作用，将理论计算与实验结果对比，为磁电相变研究提供了理论支撑。
AI 中文摘要
磁电相变已被实验研究，但尚未提出宏观理论解释其动力学起源。本研究假设具有频率的轴子准粒子经历类凝聚过程，通过引入与磁电系数成正比的耦合动态参数——轴子角，在金兹堡-朗道（Ginzburg-Landau）框架下描述这些磁电相变。我们分别推导了不同磁电材料的静态轴子角、轴子频率与相变温度之间的关系，并将这些计算结果与现有实验结果进行比较。我们还将人工设计的Dzyaloshinskii-Moriya相互作用与轴子类凝聚过程关联起来，从而得到静态轴子角与实验测量的频移之间的关系。
英文摘要
Magnetoelectric phase transitions have been experimentally studied, but no macroscopic theory has been proposed to explain their dynamical origin. In this work, we assume that the axion quasiparticle with frequency undergoes a condensation like process. We show that these magnetoelectric phase transitions can be described within a Ginzbur Landau framework by introducing a coupled dynamic parameter, the axion angle, which is proportional to the magnetoelectric coeffcient. We derive relations between the static axion angle, the axion frequency, and the phase transition temperature for different magnetoelectric materials, respectively, and compare these calculations with existing experimental results. We also connect the artificially designed Dzyaloshinskii Moriya interaction with the axion condensate like process, so that the relation between the static axion angle and the experimentally measured frequency shift can be obtained.
Comments21 pages, 5 figures, 2 tables
