论文标题
picoscale磁弹性控制非中心铁磁性Weyl半含量的异质磁域
Picoscale Magnetoelasticity Governs Heterogeneous Magnetic Domains in a Noncentrosymmetric Ferromagnetic Weyl Semimetal
论文作者
论文摘要
预计磁性Weyl半含量将在异质紧张的相位或磁性域壁上托管新兴的电磁场。拓扑和磁性特性的可调性和控制对于揭示这些现象至关重要，这些现象尚未得到充分理解或完全实现。在这里，我们使用扫描鱿鱼显微镜来对自发性磁化和磁敏感性（一种非中心的铁磁Weyl weyl semimetal候选者）的磁化率。我们观察到大型亚稳态域以及稳定的铁磁结构域。亚稳态最有可能体现一种沮丧或玻璃磁相的类型，其激发可能具有新兴和异国的性质。我们发现证据表明，两种类型的域的异质性来自磁弹性或磁性效应。我们展示了这些结构域如何形成，它们如何相互作用以及如何使用估计的晶格菌株在皮表计水平上进行操纵或稳定。 CEALSI是相关拓扑系统中劳勒斯特学的前沿材料。
Magnetic Weyl semimetals are predicted to host emergent electromagnetic fields at heterogeneous strained phases or at the magnetic domain walls. Tunability and control of the topological and magnetic properties is crucial for revealing these phenomena, which are not well understood or fully realized yet. Here, we use a scanning SQUID microscope to image spontaneous magnetization and magnetic susceptibility of CeAlSi, a noncentrosymmetric ferromagnetic Weyl semimetal candidate. We observe large metastable domains alongside stable ferromagnetic domains. The metastable domains most likely embody a type of frustrated or glassy magnetic phase, with excitations that may be of an emergent and exotic nature. We find evidence that the heterogeneity of the two types of domains arises from magnetoelastic or magnetostriction effects. We show how these domains form, how they interact, and how they can be manipulated or stabilized with estimated lattice strains on picometer levels. CeAlSi is a frontier material for straintronics in correlated topological systems.
