Berry curvature induced giant anomalous and spin texture driven Hall responses in the layered kagome antiferromagnet GdTi3Bi4
Indian Institute of Technology Delhi（印度德里理工学院）；Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences（中国科学院金属研究所沈阳材料科学国家研究中心）；Institute for Materials Research, Tohoku University（东北大学物质材料研究所学部）；Center for Science and Innovation in Spintronics, Tohoku University（东北大学自旋电子学科学与创新中心）
Shobha Singh, Shivam Rathod, Rong chen, Lipika, Sneh, Rie Y. Umetsu, Yan Sun, Kaustuv Manna
In recent years, layered kagome magnets have emerged as promising platforms for Berry-curvature engineering and unconventional transport phenomena. Here, we present the single-crystal growth, magnetization, and electrical transport characterizations of the van der Waals-like layered antiferromagnet GdTi3Bi4. The system exhibits pronounced field-induced first-order phase transitions. Comprehensive frequency, temperature, and field-dependent ac susceptibility measurements, and Hall analysis, reveals the formation of a spin-cluster-like glassy magnetic phase attributed to noncollinear spin textures. Additionally, the system demonstrates a colossal anomalous Hall conductivity σ_xy^{A}~ 8.6(7)10^{3} Ohm-1 cm-1 at 2 K). Detailed scaling analyses reveal the coexistence of skew scattering and intrinsic Berry-curvature contributions to the anomalous Hall effect. First-principles calculations highlight flat-band near the Fermi level, with f-electrons of the Gd ion contributing large intrinsic Hall response. Thus, GdTi3Bi4 emerges as a rare layered kagome magnet, exhibiting Berry curvature-induced giant anomalous and spin texture-driven Hall responses, providing a versatile platform for exploring spin-texture physics and advancing low-dimensional spintronic functionalities.
Berry-Curvature Activation by Orbital Flux in a Kagome Altermagnet
International Research Centre Magtop, Institute of Physics, Polish Academy of Sciences（波兰科学院物理研究所）；Department of Physics, University of Guilan（吉兰大学物理系）
Nature of magnetic exchange interactions in kagome antiferromagnets FeGe and FeSn
Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University（宁波大学物理科学与技术学院高压物理研究所）；College of Science, Nanjing University of Aeronautics and Astronautics（南京航空航天大学理学院）
Anomalous magnetoresistance in an antiferromagnetic Kagome semimetal heterostructures
State Key Laboratory of Semiconductor Physics and Chip Technologies, Institute of Semiconductors, Chinese Academy of Sciences（中国科学院半导体研究所半导体物理与芯片技术国家重点实验室）；Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences（中国科学院大学材料科学与光电工程技术中心）；Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences（中国科学院合肥物质科学研究院强磁场科学中心安徽省极端条件凝聚态物理重点实验室）；Key Laboratory of Electromagnetic Processing of Materials Ministry of Education, Northeastern University（东北大学教育部电磁冶金材料加工重点实验室）；Songshan Lake Materials Laboratory（松山湖材料实验室）
Response to comment on "Spin-lattice coupling and the emergence of the trimerized phase in the $S=1$ kagome antiferromagnet Na$_2$Ti$_3$Cl$_8$", Phys. Rev. Lett. 124, 167203 (2020)
在$S=1$ kagome反铁磁体Na $_2$ Ti $_3$ Cl $_8$的上下文中，我们回应Khomskii等人的评论[D.I. Khomskii，T. Mizokawa和S.V. Streltsov，Phys. Rev. Lett. 127，049701（2021）]的研究。保罗，C.- M.钟氏T. Birol和H. J. Changlani，Phys. Rev. Lett. 124，167203（2020）]。
The giant anomalous Hall and Nernst effects in Kagome permanent magnets RCo5
School of Physics & Astronomy and Center for Advanced Quantum Studies, Beijing Normal University（北京师范大学物理与天文学学院及先进量子研究中心）；Key Laboratory of Multiscale Spin Physics (Ministry of Education), Beijing Normal University（北京师范大学多尺度自旋物理教育部重点实验室）
