Dresden 2026 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 40: Transport in Materials: Diffusion, Charge, or Heat Conduction IV
MM 40.2: Talk
Friday, March 13, 2026, 10:30–10:45, SCH/A216
Investigating UAHE in layered delafossite by high-energy electron irradiation. — •Elina Zhakina1,2, Philippa McGuinness2, Romain Grasset3, Seunghyun Khim2, Marcin Konczykowski3, and Andrew Mackenzie2,4 — 1Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Bunkyo, Tokyo, Japan — 2Max Planck Institute for Chemical Physics of Solids — 3Laboratoire des Solides Irradis, CEA/DRF/IRAMIS, Ecole Polytechnique, CNRS, Institut Polytechnique de Paris, Palaiseau, France — 4Scottish Universities PhysicsAlliance, School of Physics & Astronomy, University of St. Andrews, St. Andrews, United Kingdom
PdCrO2 belongs to the delafossite family of extremely pure triangular lattice metals. While its Pd layers are metallic, the CrO2 layers are Mott insulating and order antiferromagnetically below 37 K. PdCrO2 [1]. It exhibits an unconventional anomalous Hall effect (UAHE), the origin of which has been the focus of substantial critical discussion. To investigate the origin of UAHE, we conducted a systematic study of the influence of point defects on the Hall effect of PdCrO2, the results of which are reported here. We introduced point-like defects into focused ion beam-sculpted microstructures of PdCrO2 by irradiating them with high-energy electrons. Comparing the results of UAHE as a function of disorder, we demonstrate UAHE behaviour attributed to its extrinsic origin.
Keywords: Unconventional Anomalous Hall Effect; Layered materials; High energy electron irradiation; delafossites