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arXiv 2402.12341cond-mat.mtrl-sci
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设计自旋纹理晶格以控制反铁磁体中的各向异性磁振输运输

Designed spin-texture-lattice to control anisotropic magnon transport in antiferromagnets

Peter Meisenheimer, Maya Ramesh, Sajid Husain, Isaac Harris, Hyeon Woo Park, Shiyu Zhou, Hossein Taghinejad, Hongrui Zhang, Lane W. Martin, James Analytis, Paul… 展开作者

Peter Meisenheimer, Maya Ramesh, Sajid Husain, Isaac Harris, Hyeon Woo Park, Shiyu Zhou, Hossein Taghinejad, Hongrui Zhang, Lane W. Martin, James Analytis, Paul Stevenson, Jorge Íñiguez-González, Se Kwon Kim, Darrell G. Schlom, Lucas Caretta, Zhi Yao, Ramamoorthy Ramesh

AI总结:

本研究通过在BiFeO$_3$中构建可电调谐的一维磁子晶体,探索长程自旋输运,发现显著各向异性,并通过多尺度理论揭示其源于布居不平衡与各向异性结构散射,为电可重构磁子晶体提供路径。

摘要:

磁性材料中的自旋波因其超低能耗和长相干长度,成为未来计算技术的有前景的信息载体。反铁磁体是极具潜力的候选材料,部分原因在于其对外部场的稳定性及更大的群速度。多铁性反铁磁体(如 BiFeO$_3$(BFO))具有源自磁电耦合的额外自由度,允许通过电场控制磁结构,从而控制自旋波。遗憾的是,由于磁结构的复杂性,BFO中的自旋波传播尚未得到充分理解。在这项工作中,我们探索了在通过外延工程化、可电调谐的一维(1D)磁子晶体内的长程自旋输运。我们发现在平行和垂直于1D晶轴的自旋输运中存在显著的各向异性。多尺度理论和模拟表明,这种优先磁振子传导源于其色散中的布居不平衡以及各向异性结构散射的结合。这项工作为反铁磁体中的电可重构磁旋子晶体提供了一条途径。

英文摘要:

Spin waves in magnetic materials are promising information carriers for future computing technologies due to their ultra-low energy dissipation and long coherence length. Antiferromagnets are strong candidate materials due, in part, to their stability to external fields and larger group velocities. Multiferroic aniferromagnets, such as BiFeO$_3$ (BFO), have an additional degree of freedom stemming from magnetoelectric coupling, allowing for control of the magnetic structure, and thus spin waves, with electric field. Unfortunately, spin-wave propagation in BFO is not well understood due to the complexity of the magnetic structure. In this work, we explore long-range spin transport within an epitaxially engineered, electrically tunable, one-dimensional (1D) magnonic crystal. We discover a striking anisotropy in the spin transport parallel and perpendicular to the 1D crystal axis. Multiscale theory and simulation suggests that this preferential magnon conduction emerges from a combination of a population imbalance in its dispersion, as well as anisotropic structural scattering. This work provides a pathway to electrically-reconfigurable magnonic crystals in antiferromagnets.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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