论文标题

抗病毒旋转在拓扑半学MN3GE中订购了其金石模式及其与声子的杂交

Antichiral spin order its Goldstone modes and their hybridization with phonons in the topological semimetal Mn3Ge

论文作者

Chen, Y., Gaudet, J., Dasgupta, S., Marcus, G. G., Lin, J., Chen, T., Tomita, T., Ikhlas, M., Zhao, Y., Chen, W. C., Stone, M. B., Tchernyshyov, O., Nakatsuji, S., Broholm, C.

论文摘要

具有强大运输响应的量子材料对不同物理量具有很大的重要性,并且可能具有技术潜力。相互作用与拓扑之间的相互作用通过自发对称性断裂以及相关的域配置对量子传输的影响来驱动这种响应。在这里,我们提供了MN3GE的磁性的全面描述,MN3GE是一种基于室温的抗铁磁kagome -bastem -bastem -bastem -bastembomentage kagomebome -bastimbomentage kagomebome -bastimbomentage kagomebome -bastembomentage katemagogy toss tostrolmential themembomentage。使用偏振中子衍射,我们显示了全重要的磁性结构是抗手续的,携带铁磁铁的对称性没有可观的磁化。我们探测和分类长波长激励,这些激发决定其宏观响应,包括一组集体磁弹性模式。我们开发了一种现象学旋转的哈密顿量,通过交换,dzyaloshinskii-moriya和晶体场相互作用来描述其集体磁性。在自旋波阻尼和扩展的磁相互作用中,驱动量子传输的磁性的巡回特征是显而易见的。我们的工作为操纵MN3GE的手性抗铁磁纹理的科学基础提供了控制其拓扑量子运输。

Quantum materials with strong transport responses to disparate physical quantities are of great fundamental significance and may hold technological potentials. The interplay between interactions and topology drive such responses through the effects of spontaneous symmetry breaking and the associated domain configurations on quantum transport. Here we provide a comprehensive description of the magnetism of Mn3Ge, an antiferromagnetic kagomebased semimetal with room temperature transport anomalies associated with topologically protected Weyl nodes. Using polarized neutron diffraction, we show the all-important magnetic structure is anti-chiral and coplanar carrying the symmetry of a ferromagnet without appreciable magnetization. We probe and classify the long wavelength excitations that determine its macroscopic responses including a set of collective magneto-elastic modes. We develop a phenomenological spin Hamiltonian with exchange, Dzyaloshinskii-Moriya, and crystal field interactions to describe its collective magnetism. The itinerant character of the magnetism that drives quantum transport is apparent in spin wave damping and extended magnetic interactions. Our work provides the scientific basis for manipulation of the chiral antiferromagnetic texture of Mn3Ge to control its topological quantum transport.

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