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Altermagnets are an emergent class of materials combining features of ferro- and antiferro-magnetic materials. They have spin-separated bands normally associated with ferromagnets, but a vanishing net magnetization. Moreover the symmetries…

Altermagnets have recently emerged as a distinct class of magnetic systems that exhibit spin splitting of electronic bands while retaining zero net magnetization. This unique combination makes them a promising platform for time-reversal…

Mesoscale and Nanoscale Physics · Physics 2026-01-08 Constantin Schrade , Sujit Manna , Mathias S. Scheurer

Altermagnets exhibit spontaneously spin-split electronic bands in the zero spin-orbit coupling (SOC) limit arising from the presence of collinear compensated magnetic order. The distinctive magneto-crystalline symmetries of altermagnets…

Strongly Correlated Electrons · Physics 2025-10-03 Hana Schiff , Paul McClarty , Jeffrey G. Rau , Judit Romhanyi

It has been known that the spin-wave dispersion, which is usually symmetric in the momentum space with respect to ${\bf q}=0$, can be asymmetric in the presence of the Dzyaloshinskii-Moriya (DM) interaction and an applied magnetic field.…

Strongly Correlated Electrons · Physics 2025-04-16 Kazushi Aoyama , Hikaru Kawamura

The complex structure of the valence band in many semiconductors leads to multifaceted and unusual properties for spin-3/2 hole systems compared to typical spin-1/2 electron systems. In particular, two-dimensional hole systems show a highly…

Mesoscale and Nanoscale Physics · Physics 2018-06-22 C. Gradl , R. Winkler , M. Kempf , J. Holler , D. Schuh , D. Bougeard , A. Hernández-Mínguez , K. Biermann , P. V. Santos , C. Schüller , T. Korn

Ferromagnets with high spin polarization are known to be valuable for spintronics--a research field that exploits the spin degree of freedom in information technologies. Recently, antiferromagnets have emerged as promising alternative…

Materials Science · Physics 2024-12-02 Gautam Gurung , Mohamed Elekhtiar , Qing-Qing Luo Ding-Fu Shao , Evgeny Y. Tsymbal

Cluster magnetic multipoles are order parameters that describe the symmetry of spin arrangements in magnetic materials. High-order multipoles are particularly important in non-collinear antiferromagnets, where they determine key physical…

Mesoscale and Nanoscale Physics · Physics 2025-01-14 Myoung-Woo Yoo , Axel Hoffmann

Altermagnetism represents a recently established class of collinear magnetism that combines zero net magnetization with momentum-dependent spin polarization, enabled by symmetry constraints rather than spin-orbit coupling. This distinctive…

Materials Science · Physics 2026-03-16 Ali Sufyan , Brahim Marfoua , J. Andreas Larsson , Erik van Loon , Rickard Armiento

We provide a theoretical demonstration of controllable non-relativistic spin splitting in both electronic and magnonic bands via targeted structural distortions tied to specific phonon modes. Using MnF$_2$ as a model system, we identify a…

Materials Science · Physics 2025-09-11 Subhadeep Bandyopadhyay , Anoop Raj , Philippe Ghosez , Sumiran Pujari , Sayantika Bhowal

Topological spin structures such as magnetic skyrmions are of fundamental interest and promising for various types of applications in spintronics. Skyrmions have been predicted to emerge also in antiferromagnetic materials where they…

Unconventional antiferromagnets with spin-split bands, such as noncollinear magnets and the recently discovered altermagnets, serve as new constituents to explore unconventional superconductivity. Here, we unveil a new type and previously…

Superconductivity · Physics 2026-02-24 Song-Bo Zhang , Lun-Hui Hu , Qian Niu , Zhenyu Zhang

Spin-split antiferromagnets have significance for antiferromagnetic (AFM) spintronics due to their momentum dependent spin polarization which can be exploited for the control and detection of the AFM order parameter. Here, we explore the…

Materials Science · Physics 2025-03-14 Himanshu Mavani , Kai Huang , Kartik Samanta , Evgeny Y. Tsymbal

We present a formalism based on colour symmetry to analyse the momentum-space spin textures of non-collinear antiferromagnets. We show that, out of the spin textures allowed by the magnetic point group, \textcolor{\altcolor} {one can…

Strongly Correlated Electrons · Physics 2025-06-23 Paolo G. Radaelli , Gautam Gurung

It was recently discovered that, depending on their symmetries, collinear antiferromagnets can actually break the spin degeneracy in momentum space, even in the absence of spin-orbit coupling. Such systems, recently dubbed altermagnets, are…

Materials Science · Physics 2024-03-20 Yaqian Guo , Hui Liu , Oleg Janson , Ion Cosma Fulga , Jeroen van den Brink , Jorge I. Facio

Using a pure electric current to control kagome noncollinear antiferromagnets is promising in information storage and processing, but a full description is still lacking, in particular, on intrinsic (i.e., no external magnetic fields or…

Mesoscale and Nanoscale Physics · Physics 2024-04-01 Yiyuan Chen , Z. Z. Du , Hai-Zhou Lu , X. C. Xie

The development of altermagnets is fundamentally important for advancing spintronic device technology, but remains unpractical for the weak spin splitting in most cases, especially in two-dimensional materials. Based on spin group symmetry…

Materials Science · Physics 2026-02-03 Xinyu Yang , Shan-Shan Wang , Shuai Dong

The realization of multiferroic altermagnets featuring giant intrinsic spin splitting, hold great promise for next-generation spintronics. In this work, based on the recently proposed concept of spin-antiferroelectric (spin-AFE), we…

Materials Science · Physics 2026-04-14 Zesen Fu , Aolin Li , Wenzhe Zhou , Fangping Ouyang , Fawei Zheng , Yugui Yao

Altermagnetism has emerged as a third type of collinear magnetism. In contrast to standard ferromagnets and antiferromagnets, altermagnets exhibit extra even-parity wave spin order parameters resulting in a spin-splitting of electronic…

Strongly Correlated Electrons · Physics 2024-06-17 Valentin Leeb , Alexander Mook , Libor Šmejkal , Johannes Knolle

We study the frequency non-reciprocity of the spin waves in symmetric CoFeB/Ru/CoFeB synthetic antiferromagnets stacks set in the scissors state by in-plane applied fields. Using a combination of Brillouin Light Scattering and propagating…

Materials Science · Physics 2026-03-23 F. Millo , J. -P. Adam , C. Chappert , J. -V. Kim , A. Mouhoub , A. Solignac , T. Devolder

We show that strong electromagnon peaks can be found in absorption spectra of non-collinear magnets exhibiting a linear magnetoelectric effect. The frequencies of these peaks coincide with the frequencies of antiferromagnetic resonances and…

Materials Science · Physics 2009-07-20 M. A. van der Vegte , C. P. van der Vegte , M. Mostovoy