Antiferromagnets for spinorbitronics from ab-initio theory

从头算理论用于自旋电子学的反铁磁体

• 批准号: 332785078
• 负责人: Professor Dr. Yuriy Mokrousov
• 金额: --
• 依托单位: Institut für Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/332785078?language=en
• 关键词: Antiferromagnets; spinorbitronics; ab; initio; theory

The potential of spintronics for applications and new emergent technologies is highest in decades. The discovery of the spin-orbit interaction as the source behind transverse spin-currents heralds the beginning of an exciting research direction called spinorbitronics. While most of the current studies in spinorbitronics are closely associated with paramagnets and ferromagnets, antiferromagnetic (AFM) materials have been so far largely overlooked with respect to spin-orbit driven transport manifestations and spinorbitronics applications, despite their remarkable properties such as magnetic invisibility, ultrafast dynamics and robustness against magnetic fields. In the past couple of years a new promising field of antiferromagnetic spinorbitronics started to emerge owing in large to the observations that antiferromagnets can serve as sources of pronounced transverse spin currents, and that an all-electrical relativistic switching of staggered AFM magnetization is possible. In this project, we will use the highly-predictive ab-initio theory, which can unite under the same umbrella the effects due to relativistic coupling of currents and magnetization in AFM heterostructures for the design, understanding and discovery of novel relativistic effects which manifest in: (i) spin- and anomalous Hall effects, spin-orbit torques, and current-induced spin accumulation; (ii) AFM magnetization-dynamics driven charge- and spin-pumping effects, and (iii) non-trivial orbital and chiral response of AFMs in terms of current-induced orbital magnetization and Dzyaloshinskii-Moriya interaction. Our ultimate objective is shaping the future of antiferromagnetic spinorbitronics by suggesting new effects and sharpening the efficiency and materials design for electrical control of antiferromagnetism.

自旋电子学在应用和新兴技术方面的潜力是几十年来最高的。发现自旋轨道相互作用是横向自旋电流的来源，预示着一个令人兴奋的研究方向的开始，称为自旋轨道电子学。虽然目前大多数自旋轨道电子学的研究与顺磁体和铁磁体密切相关，但反铁磁（AFM）材料在自旋轨道驱动输运表现和自旋轨道电子学应用方面一直被忽视，尽管它们具有显着的特性，如磁不可见性，超快动力学和对磁场的鲁棒性。在过去的几年中，一个新的有前途的领域，反铁磁自旋电子学开始出现，由于在很大程度上的观察，反铁磁体可以作为显着的横向自旋电流的来源，和一个全电相对论切换交错AFM磁化是可能的。在这个项目中，我们将使用具有高度预测性的从头算理论，它可以将AFM异质结构中电流和磁化的相对论耦合效应统一在同一个保护伞下，用于设计、理解和发现新的相对论效应，这些效应表现在：（i）自旋和反常霍尔效应，自旋轨道力矩和电流诱导的自旋积累;（ii）AFM磁化动力学驱动的电荷和自旋泵效应，和（iii）非平凡的轨道和手性响应的AFM在电流诱导的轨道磁化和Dzyaloshinskiii-Moriya相互作用。我们的最终目标是通过提出新的效应和提高反铁磁电控制的效率和材料设计来塑造反铁磁自旋轨道电子学的未来。

项目成果

The chiral Hall effect in canted ferromagnets and antiferromagnets

• DOI: 10.1038/s42005-021-00587-3
• 发表时间: 2020-07
• 期刊: Communications Physics
• 影响因子: 5.5
• 作者: J. Kipp;K. Samanta;F. Lux;M. Merte;D. Go;Jan-Philipp Hanke;M. Redies;F. Freimuth;S. Blügel;M. Ležaić;Y. Mokrousov

Topological magneto-optical effects and their quantization in noncoplanar antiferromagnets

非共面反铁磁体中的拓扑磁光效应及其量化

• DOI: 10.1038/s41467-019-13968-8
• 发表时间: 2020-01-08
• 期刊: NATURE COMMUNICATIONS
• 影响因子: 16.6
• 作者: Feng, Wanxiang;Hanke, Jan-Philipp;Yao, Yugui
• 通讯作者: Yao, Yugui

Long-range chiral exchange interaction in synthetic antiferromagnets

• DOI: 10.1038/s41563-019-0370-z
• 发表时间: 2019-07-01
• 期刊: NATURE MATERIALS
• 影响因子: 41.2
• 作者: Han, Dong-Soo;Lee, Kyujoon;Klaeui, Mathias
• 通讯作者: Klaeui, Mathias