Spin and orbital magnetism by light in rutile altermagnets

被引：0

作者：

Theodoros Adamantopoulos ^{[1
]}

Maximilian Merte ^{[2
]}

Frank Freimuth ^{[1
]}

Dongwook Go ^{[2
]}

Lishu Zhang ^{[3
]}

Marjana Ležaić ^{[3
]}

Wanxiang Feng ^{[3
]}

Yugui Yao ^{[1
]}

Jairo Sinova ^{[1
]}

Libor Šmejkal ^{[4
]}

Stefan Blügel ^{[5
]}

Yuriy Mokrousov ^{[4
]}

机构：

[1] Peter Grünberg Institut,Department of Physics

[2] Forschungszentrum Jülich,Institute of Physics

[3] RWTH Aachen University,Centre for Quantum Physics, Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics

[4] Johannes Gutenberg University Mainz,Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic Systems, School of Physics

[5] Beijing Institute of Technology,Institute of Physics

[6] Beijing Institute of Technology,undefined

[7] Czech Academy of Sciences,undefined

[8] Max Planck Institute for the Physics of Complex Systems,undefined

来源：

npj Spintronics | / 2卷 / 1期

关键词：

D O I：

10.1038/s44306-024-00053-0

中图分类号：

学科分类号：

摘要：

While the understanding of altermagnetism is still at a very early stage, it is expected to play a role in various fields of condensed matter research, for example spintronics, caloritronics and superconductivity. In the field of optical magnetism, it is still unclear to which extent altermagnets as a class can exhibit a distinct behavior. Here we choose RuO2, a prototype metallic altermagnet with a giant spin splitting, and CoF2, an experimentally known insulating altermagnet, to study the light-induced magnetism in rutile altermagnets from first-principles. We demonstrate that in the non-relativisic limit the allowed sublattice-resolved orbital response exhibits symmetries, imposed by altermagnetism, which lead to a drastic canting of light-induced moments. On the other hand, we find that inclusion of spin-orbit interaction enhances the overall effect drastically, introduces a significant anisotropy with respect to the light polarization and strongly suppresses the canting of induced moments. Remarkably, we observe that the moments induced by linearly-polarized laser pulses in light altermagnets can even exceed in magnitude those predicted for heavy ferromagnets exposed to circularly polarized light. By resorting to microscopic tools we interpret our results in terms of the altermagnetic spin splittings and of their reciprocal space distribution. Based on our findings, we speculate that optical excitations may provide a unique tool to switch and probe the magnetic state of rutile altermagnets.

引用

共 91 条

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