Understanding unusual chirality-driven anomalous Hall effect via scattering theory

Recently, AHE, originating from spin chirality, has become a popular method for detecting chiral magnetic structures, such as skyrmions, which are key to the development of next-generation spintronics and quantum technologies. However, in experiments, chirality-related AHE often exhibits complex behaviors, including unusual non-monotonic temperature dependence and even sign reversals, making clear detection of these structures difficult. A systematic understanding of such behaviors is currently lacking and, moreover, requires extensive numerical calculations.

To address this challenge, a research team led by Associate Professor Hiroaki Ishizuka from the Department of Physics at Institute of Science Tokyo (Science Tokyo), Japan, in collaboration with Professor Masafumi Udagawa from the Department of Physics, Gakushuin University, Japan, has developed a novel theoretical framework. “Our theory focuses on quantum phase interference during electron scattering by chiral spin textures, clearly explaining the puzzling temperature- and magnetic-field dependence of the AHE in highly conductive metals,” explains Ishizuka. Their study was published in Volume 135, Issue 25 of the journal Physical Review Letters on December 16, 2025.

• Understanding unusual chirality-driven anomalous Hall effect via scattering theory