Discovery of Topological Magnetic Textures near Room Temperature in Quantum Magnet TbMn6 Sn6

Zhuolin Li; Qiangwei Yin; Yi Jiang; ZhaoZhao Zhu; Yang Gao; Shouguo Wang; Jun Shen; Tongyun Zhao; Jianwang Cai; Hechang Lei; Shi-Zeng Lin; Ying Zhang; Baogen Shen

doi:10.1002/adma.202211164

Discovery of Topological Magnetic Textures near Room Temperature in Quantum Magnet TbMn₆ Sn₆

Adv Mater. 2023 May;35(20):e2211164. doi: 10.1002/adma.202211164. Epub 2023 Mar 29.

Authors

Zhuolin Li^{1

2}, Qiangwei Yin³, Yi Jiang^{1

2}, ZhaoZhao Zhu^{1

2

4}, Yang Gao^{1

2

5}, Shouguo Wang⁵, Jun Shen⁶, Tongyun Zhao^{1

2}, Jianwang Cai^{1

2}, Hechang Lei³, Shi-Zeng Lin⁷, Ying Zhang^{1

2

4}, Baogen Shen^{1

2

8}

Affiliations

¹ Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
² School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 101408, China.
³ Laboratory for Neutron Scattering, Beijing Key Laboratory of Opto-Electronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing, 100872, China.
⁴ Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China.
⁵ School of Materials Science and Engineering, Anhui University, Hefei, 230601, China.
⁶ Department of Energy and Power Engineering, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, China.
⁷ Theoretical Division and Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA.
⁸ Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, China.

PMID: 36856016
DOI: 10.1002/adma.202211164

Abstract

The study of topology in quantum materials has fundamentally advanced the understanding in condensed matter physics and potential applications in next-generation quantum information technology. Recently, the discovery of a topological Chern phase in the spin-orbit-coupled Kagome lattice TbMn₆ Sn₆ has attracted considerable interest. Whereas these phenomena highlight the contribution of momentum space Berry curvature and Chern gap on the electronic transport properties, less is known about the intrinsic real space magnetic texture, which is crucial for understanding the electronic properties and further exploring the unique quantum behavior. Here, the stabilization of topological magnetic skyrmions in TbMn₆ Sn₆ using Lorentz transmission electron microscopy near room temperature, where the spins experience full spin reorientation transition between the a- and c-axes, is directly observed. An effective spin Hamiltonian based on the Ginzburg-Landau theory is constructed and micromagnetic simulation is performed to clarify the critical role of Ruderman-Kittel-Kasuya-Yosida interaction on the stabilization of skyrmion lattice. These results not only uncover nontrivial spin topological texture in TbMn₆ Sn₆ , but also provide a solid basis to study its interplay with electronic topology.

Keywords: Kagome lattice; Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction; quantum magnet TbMn 6Sn 6; topological Hall conductivity; topological skyrmion.

Abstract

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