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MA: Fachverband Magnetismus
MA 52: Altermagnets
MA 52.6: Vortrag
Freitag, 22. März 2024, 10:45–11:00, EB 202
Strain induced anomalous Hall effect in the altermagnet ruthenium-dioxide — •Bennet Karetta1, V.K. Bharadwaj1, R. Jaeschke-Ubiergo1, Libor Šmejkal1,2, and Jairo Sinova1,3 — 1Insitut fur Physik, Johannes Gutenberg Universität Mainz, D-55099 — 2Inst. of Physics Academy of Sciences of the Czech Republic, Cukrovarnicka 10, Praha 6, Czech Republic — 3Department of Physics, Texas A\&M University, College Station, Texas 77843-4242, USA
We explore the influence of strain on the magnetic and anomalous Hall transport properties of altermagnetic RuO2. We illustrate a shift from an out-of-plane to an in-plane magnetic moment configuration under a sufficient shear strain. This strain-induced symmetry breaking presents in RuO2, resulting in a measurable anomalous Hall effect response. This effect involves a two-step switch in the Hall conductivity. For minor strains, the out-of-plane component of the Hall vector becomes non-zero. After reorientation of magnetic moments, an in-plane component can be generated. We demonstrate that the Berry's curvature-mediated anomalous Hall effect exhibits a substantial magnitude, on the order of hundreds of S/cm. The non-zero components undergo a change when the Néel order reorients from out-of-plane to in-plane. Our findings point towards possible application of strain-controlled magneto-transport based devices based on light common elements, paving the way to sustainable environmentally friendly sensory systems.
Keywords: Altermagnetism; Anomalous Hall effect; Spintronics; strain; elasticity