中国物理B ›› 2026, Vol. 35 ›› Issue (5): 57201-057201.doi: 10.1088/1674-1056/ae44f0

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Large anomalous Hall and Nernst effect in the breathing kagome ferromagnet NdCrGe3

Yang Liu(刘洋)1,2, Meng Lyu(吕孟)1, Junyan Liu(刘俊艳)1, Yibo Wang(王一博)1,2, Jinying Yang(杨金颖)1, Binbin Wang(王彬彬)1, Xiyang Li(李西阳)1, and Enke Liu(刘恩克)1,2,†   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2026-01-29 修回日期:2026-01-29 接受日期:2026-02-12 发布日期:2026-04-29
  • 通讯作者: Enke Liu,E-mail:ekliu@iphy.ac.cn E-mail:ekliu@iphy.ac.cn
  • 基金资助:
    This work was supported by the National Key R&D Program of China (Grant No. 2024YFA1409200), the National Natural Science Foundation of China (Grant Nos. 12595332 and 11974394), the Chinese Academy of Sciences (CAS) Project for Young Scientists in Basic Research (Grant No. YSBR-057), the Synergetic Extreme Condition User Facility (SECUF), and the Scientific Instrument Developing Project of CAS (Grant No. ZDKYYQ20210003).

Large anomalous Hall and Nernst effect in the breathing kagome ferromagnet NdCrGe3

Yang Liu(刘洋)1,2, Meng Lyu(吕孟)1, Junyan Liu(刘俊艳)1, Yibo Wang(王一博)1,2, Jinying Yang(杨金颖)1, Binbin Wang(王彬彬)1, Xiyang Li(李西阳)1, and Enke Liu(刘恩克)1,2,†   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2026-01-29 Revised:2026-01-29 Accepted:2026-02-12 Published:2026-04-29
  • Contact: Enke Liu,E-mail:ekliu@iphy.ac.cn E-mail:ekliu@iphy.ac.cn
  • Supported by:
    This work was supported by the National Key R&D Program of China (Grant No. 2024YFA1409200), the National Natural Science Foundation of China (Grant Nos. 12595332 and 11974394), the Chinese Academy of Sciences (CAS) Project for Young Scientists in Basic Research (Grant No. YSBR-057), the Synergetic Extreme Condition User Facility (SECUF), and the Scientific Instrument Developing Project of CAS (Grant No. ZDKYYQ20210003).

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摘要： The anomalous Hall and Nernst effects provide critical probes for investigating the Berry-curvature-related electronic band characteristics in magnetic materials. In this study, we conducted a comprehensive investigation into the magnetic, electrical, and thermal transport properties of NdCrGe$_{3}$ single crystals with a Ge-based breathing kagome lattice. This compound undergoes a ferromagnetic transition at 128 K, and magnetic ordering of the Nd sublattice emerges below 100 K. Transport measurements indicate that NdCrGe$_{3}$ manifests large anomalous Hall conductivity with $\sigma_{xy}^{{\rm A}} \approx 380 \Omega ^{-1}\cdot$cm$^{-1}$ at low temperatures and an anomalous Nernst coefficient with $\vert S_{xy}^{{\rm A-max}}\vert = 0.74$ μV/K at 100 K. Scaling analysis reveals that NdCrGe$_{3}$ exhibits large intrinsic anomalous Hall conductivity of $\sim 260 \Omega^{-1}\cdot$cm$^{-1}$ and falls within the intrinsic regime of the unified model. Furthermore, the anomalous Nernst coefficient breaks down the scaling relationship with magnetization observed in conventional ferromagnets, while the anomalous Nernst conductivity manifests a scaling behavior of $T \ln T$. These results demonstrate that the anomalous transverse transport properties of NdCrGe$_{3}$ are predominantly governed by the intrinsic Berry mechanism.

关键词: anomalous Hall effect, anomalous Nernst effect, Berry curvature, breathing kagome lattice, NdCrGe$_{3}$

Abstract: The anomalous Hall and Nernst effects provide critical probes for investigating the Berry-curvature-related electronic band characteristics in magnetic materials. In this study, we conducted a comprehensive investigation into the magnetic, electrical, and thermal transport properties of NdCrGe$_{3}$ single crystals with a Ge-based breathing kagome lattice. This compound undergoes a ferromagnetic transition at 128 K, and magnetic ordering of the Nd sublattice emerges below 100 K. Transport measurements indicate that NdCrGe$_{3}$ manifests large anomalous Hall conductivity with $\sigma_{xy}^{{\rm A}} \approx 380 \Omega ^{-1}\cdot$cm$^{-1}$ at low temperatures and an anomalous Nernst coefficient with $\vert S_{xy}^{{\rm A-max}}\vert = 0.74$ μV/K at 100 K. Scaling analysis reveals that NdCrGe$_{3}$ exhibits large intrinsic anomalous Hall conductivity of $\sim 260 \Omega^{-1}\cdot$cm$^{-1}$ and falls within the intrinsic regime of the unified model. Furthermore, the anomalous Nernst coefficient breaks down the scaling relationship with magnetization observed in conventional ferromagnets, while the anomalous Nernst conductivity manifests a scaling behavior of $T \ln T$. These results demonstrate that the anomalous transverse transport properties of NdCrGe$_{3}$ are predominantly governed by the intrinsic Berry mechanism.

Key words: anomalous Hall effect, anomalous Nernst effect, Berry curvature, breathing kagome lattice, NdCrGe$_{3}$

中图分类号:  (Electronic conduction in metals and alloys)

  • 72.15.-v
72.15.Jf (Thermoelectric and thermomagnetic effects) 75.20.En (Metals and alloys)