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Complex electronic topography and magnetotransport in an in-plane ferromagnetic kagome metal

Anup Pradhan Sakhya ^1,2, Richa Pokharel Madhogaria³, Barun Ghosh^4,5,6, Nabil Atlam ^4,5, Milo Sprague¹, Mazharul Islam Mondal¹, Himanshu Sheokand ¹, Arun K. Kumay¹, Shirin Mozaffari ³ et al.

Rui Xue⁸, Yong P. Chen⁷, David G. Mandrus ^3,8,9, Arun Bansil^4,5, and Madhab Neupane ^1,*

¹Department of Physics, University of Central Florida, Orlando, Florida 32816, USA
²Research Institute for Synchrotron Radiation Science (HiSOR), Hiroshima University, Higashi-Hiroshima 739-0046, Japan
³Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996, USA
⁴Department of Physics, Northeastern University, Boston, Massachusetts 02115, USA
⁵Quantum Materials and Sensing Institute, Northeastern University, Burlington, Massachusetts 01803, USA
⁶Department of Condensed Matter and Materials Physics, S. N. Bose National Centre for Basic Sciences, Kolkata-700106, India
⁷Department of Physics and Astronomy and Purdue Quantum Science and Engineering Institute, Purdue University, West Lafayette, Indiana 47907, USA
⁸Department of Physics and Astronomy, University of Tennessee Knoxville, Knoxville, Tennessee 37996, USA
⁹Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

^*Contact author: madhab.neupane@ucf.edu

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Phys. Rev. Materials 10, L051201 – Published 11 May, 2026

DOI: https://doi.org/10.1103/2q8z-625s

Abstract

The intricate interplay between flat bands, Dirac cones, and magnetism in kagome materials has recently attracted significant attention from materials scientists, particularly in compounds belonging to the R ${Mn}_{6} {Sn}_{6}$ family (R = Sc, Y, rare-earths), due to their inherent magnetic frustration. Here, we present a detailed investigation of the ferromagnetic (FM) kagome magnet ${ScMn}_{6} ({Sn}_{0.78} {Ga}_{0.22})_{6}$ using angle-resolved photoemission spectroscopy (ARPES), magnetotransport measurements, and density functional theory (DFT) calculations. Our findings reveal a paramagnetic-to-FM transition at 375 K, with the in-plane direction serving as the easy magnetization axis. Notably, ARPES measurements reveal a Dirac cone near the Fermi energy, while the Hall resistivity exhibits a substantial contribution from the anomalous Hall effect. Additionally, we observe a flat band spanning a substantial portion of the Brillouin zone, arising from the destructive interference of wave functions in the Mn kagome lattice. Theoretical calculations reveal that the gap in the Dirac cone can be modulated by altering the orientation of the magnetic moment. An out-of-plane orientation produces a gap of approximately 15 meV, while an in-plane alignment leads to a gapless state, as corroborated by ARPES measurements. This comprehensive analysis provides valuable insights into the electronic structure of magnetic kagome materials and paves the way for exploring novel topological phases in this material class.

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Quantum Phenomena in Kagome Materials

The Editors of Physical Review Materials are pleased to present the Collection on Quantum Phenomena in Kagome Materials, highlighting cutting-edge advances in theory, synthesis, properties and applications of kagome materials. The Collection is being guest-edited by Mingda Li (MIT), Xiangang Wan (Nanjing University) and Linda Ye (Caltech). Every article published in this collection underwent a rigorous peer review process, adhering to the same high standards applied to all papers. The Physical Review Materials editorial team managed the peer review and made all editorial decisions.

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Complex electronic topography and magnetotransport in an in-plane ferromagnetic kagome metal

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Quantum Phenomena in Kagome Materials

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