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Anisotropic anomalous Hall effect in distorted kagome GdTi3Bi4

Avdhesh K. Sharma1, Bo Tai1, Subhajit Roychowdhury1,2, Premakumar Yanda1, Ulrich Burkhardt1, Xiaolong Feng1, Claudia Felser1,*, and Chandra Shekhar1,†

  • *Contact author: felser@cpfs.mpg.de
  • †Contact author: shekhar@cpfs.mpg.de
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Phys. Rev. B 113, L060402 – Published 3 February, 2026

DOI: https://doi.org/10.1103/bnvq-rbdc

Abstract

Topological kagome magnets offer a rich landscape for exploring the intricate interplay of quantum interactions among geometry, topology, spin, and correlation. GdTi3Bi4 crystallizes in layered Ti-based kagome nets intertwined with zigzag Gd chains along the a axis and orders antiferromagnetically below ∼15K. Here, we present the temperature- and field-dependent electrical transport of GdTi3Bi4 in different directions. The material exhibits anomalous Hall conductivity (AHC) of 410Ω−1cm−1 at 2 K for μ0H∥c, and it is completely absent for μ0H∥a, despite the similar magnetizations observed in both orientations. This behavior is quite contradictory, as the anomalous Hall effect (AHE) typically scales with the magnetization. Through first-principles calculations, it is demonstrated that in the presence of time-reversal symmetry broken by the Gd 4f sublattice and spin-orbit coupling, the magnetization direction controls the orbital mixing in the Ti t2g bands, relocating Berry-curvature hot spots and producing the observed orientation-selective AHC. The results establish GdTi3Bi4 as a platform for investigating new avenues of the AHE, such as directional AHE, and thus shed light on the intricate coupling between magnetic and electronic structures, paving the way for exploring novel quantum phenomena.

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Phys. Rev. B 113, L060402– Published 3 February, 2026
  • Received 20 October 2025
  • Revised 17 December 2025
  • Accepted 5 January 2026
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