首页|Anisotropic magnetism and band evolution induced by ferromagnetic phase transition in titanium-based kagome ferromagnet SmTi3Bi4

Anisotropic magnetism and band evolution induced by ferromagnetic phase transition in titanium-based kagome ferromagnet SmTi3Bi4

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Kagome magnets with diverse topological quantum responses are crucial for next-generation topological engineering.The anisotropic magnetism and band evolution induced by ferromagnetic phase transition(FMPT)is reported in a newly discov-ered titanium-based kagome ferromagnet SmTi3Bi4,which features a distorted Ti kagome lattice and Sm atomic zig-zag chains.Temperature-dependent resistivity,heat capacity,and magnetic susceptibility reveal a ferromagnetic ordering temperature Tc of 23.2 K.A large magnetic anisotropy,observed by applying the magnetic field along three crystallographic axes,identifies the b axis as the easy axis.Angle-resolved photoemission spectroscopy with first-principles calculations unveils the characteristic kagome motif,including the Dirac point at the Fermi level and multiple van Hove singularities.Notably,a band splitting and gap closing attributed to FMPT is observed,originating from the exchange coupling between Sm 4f local moments and itinerant electrons of the kagome Ti atoms,as well as the time-reversal symmetry breaking induced by the long-range ferromagnetic or-der.Considering the large in-plane magnetization and the evolution of electronic structure under the influence of ferromagnetic ordering,such materials promise to be a new platform for exploring the intricate electronic properties and magnetic phases based on the kagome lattice.

kagome latticeanisotropic magnetismband splittingferromagnetic phase transitionARPES

Zhe Zheng、Long Chen、Xuecong Ji、Ying Zhou、Gexing Qu、Mingzhe Hu、Yaobo Huang、Hongming Weng、Tian Qian、Gang Wang

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Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

University of Chinese Academy of Sciences,Beijing 100049,China

School of Physics and Engineering,Henan University of Science and Technology,Luoyang 471023,China

Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China

Songshan Lake Materials Laboratory,Dongguan 523808,China

CAS Center for Excellence in Topological Quantum Computation,Chinese Academy of Sciences,Beijing 100190,China

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Synergetic Extreme Condition User Facility(SECUF)National Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaInformatization Plan of the Chinese Academy of SciencesStrategic Priority Research Program of Chinese Academy of sciencesStrategic Priority Research Program of Chinese Academy of sciencesthe"Dreamline"beamline of Shanghai Synchrotron Radiation Facility(SSRF)

2022YFA14038002022YFA14039002018YFE0202600U22A60055183201011888101119254081192100412188101CASWX2021SF-0102XDB33000000XDB28000000

2024

10.1007/s11433-023-2344-6

中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
年,卷(期)：2024.67(6)