Alternating spin splitting of electronic and magnon bands in two-dimensional altermagnetic materials

doi:10.1088/1674-1056/ad6425

中国物理B ›› 2024, Vol. 33 ›› Issue (9): 97507-097507.doi: 10.1088/1674-1056/ad6425

Alternating spin splitting of electronic and magnon bands in two-dimensional altermagnetic materials

Qian Wang(王乾), Da-Wei Wu(邬大为), Guang-Hua Guo(郭光华), Meng-Qiu Long(龙孟秋)†, and Yun-Peng Wang(王云鹏)‡

School of Physics, Central South University, Changsha 410083, China

收稿日期:2024-06-27 修回日期:2024-07-16 接受日期:2024-07-17 出版日期:2024-09-15 发布日期:2024-08-22
通讯作者: Meng-Qiu Long, Yun-Peng Wang E-mail:mqlong@csu.edu.cn;yunpengwang@csu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 12004439), Hunan Province Postgraduate Research and Innovation Project (Grant No. CX20230229), and the computational resources from the High Performance Computing Center of Central South University.

Alternating spin splitting of electronic and magnon bands in two-dimensional altermagnetic materials

Qian Wang(王乾), Da-Wei Wu(邬大为), Guang-Hua Guo(郭光华), Meng-Qiu Long(龙孟秋)†, and Yun-Peng Wang(王云鹏)‡

School of Physics, Central South University, Changsha 410083, China

Received:2024-06-27 Revised:2024-07-16 Accepted:2024-07-17 Online:2024-09-15 Published:2024-08-22
Contact: Meng-Qiu Long, Yun-Peng Wang E-mail:mqlong@csu.edu.cn;yunpengwang@csu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 12004439), Hunan Province Postgraduate Research and Innovation Project (Grant No. CX20230229), and the computational resources from the High Performance Computing Center of Central South University.

摘要/Abstract

摘要： Unconventional antiferromagnetism dubbed as altermagnetism was first discovered in rutile structured magnets, which is featured by spin splitting even without the spin-orbital coupling effect. This interesting phenomenon has been discovered in more altermagnetic materials. In this work, we explore two-dimensional altermagnetic materials by studying two series of two-dimensional magnets, including $M\mathrm{F_4}$ with $M$ covering all 3d and 4d transition metal elements, as well as $T\mathrm{S_2}$ with $T = {\rm V}$, Cr, Mn, Fe. Through the magnetic symmetry operation of RuF$_4$ and MnS$_2$, it is verified that breaking the time inversion is a necessary condition for spin splitting. Based on symmetry analysis and first-principles calculations, we find that the electronic bands and magnon dispersion experience alternating spin splitting along the same path. This work paves the way for exploring altermagnetism in two-dimensional materials.

关键词: two-dimensional altermagnetic materials, altermagnetism, spin splitting, first-principles calculations

Abstract: Unconventional antiferromagnetism dubbed as altermagnetism was first discovered in rutile structured magnets, which is featured by spin splitting even without the spin-orbital coupling effect. This interesting phenomenon has been discovered in more altermagnetic materials. In this work, we explore two-dimensional altermagnetic materials by studying two series of two-dimensional magnets, including $M\mathrm{F_4}$ with $M$ covering all 3d and 4d transition metal elements, as well as $T\mathrm{S_2}$ with $T = {\rm V}$, Cr, Mn, Fe. Through the magnetic symmetry operation of RuF$_4$ and MnS$_2$, it is verified that breaking the time inversion is a necessary condition for spin splitting. Based on symmetry analysis and first-principles calculations, we find that the electronic bands and magnon dispersion experience alternating spin splitting along the same path. This work paves the way for exploring altermagnetism in two-dimensional materials.

Key words: two-dimensional altermagnetic materials, altermagnetism, spin splitting, first-principles calculations

中图分类号: (Antiferromagnetics)

75.50.Ee

61.50.Ah (Theory of crystal structure, crystal symmetry; calculations and modeling) 11.55.Fv (Dispersion relations)

Qian Wang(王乾), Da-Wei Wu(邬大为), Guang-Hua Guo(郭光华), Meng-Qiu Long(龙孟秋), and Yun-Peng Wang(王云鹏). Alternating spin splitting of electronic and magnon bands in two-dimensional altermagnetic materials[J]. 中国物理B, 2024, 33(9): 97507-097507.

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Alternating spin splitting of electronic and magnon bands in two-dimensional altermagnetic materials

Alternating spin splitting of electronic and magnon bands in two-dimensional altermagnetic materials

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