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MA: Fachverband Magnetismus

MA 20: Altermagnets III

MA 20.4: Vortrag

Dienstag, 10. März 2026, 14:45–15:00, HSZ/0002

hall viscosity of altermagnet — •iksu jang¹, rui aquino², rafael fernandes^3,4, and jörg schmalian^1,5 — ¹Institute for Theory of Condensed Matter, Karlsruhe Institute of Technology, Karlsruhe 76131, Germany — ²ICTP, South American Institute for Fundamental Research Instituto de Física Teórica da UNESP, Universidade Estadual Paulista, Rua Doutor Bento Teobaldo Ferraz 271, 01140-070 São Paulo, Brasil — ³Department of Physics, The Grainger College of Engineering, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, USA — ⁴Anthony J. Leggett Institute for Condensed Matter Theory, The Grainger College of Engineering, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, USA — ⁵Institute for Quantum Materials and Technologies, Karlsruhe Institute of Technology, Karlsruhe 76131, Germany

Altermagnets have garnered significant interest due to their ability to exhibit spin splitting without spin orbit coupling and their symmetry-driven phenomena, such as elastic quantum criticality and elasto-Hall responses. In this work, we investigate the Hall viscosity of altermagnets subject to strain. Using group-theoretical analysis and tight-binding calculations, we show that altermagnetic systems with various form factors can host a finite Hall viscosity. We additionally propose that the acoustic Faraday effect offers a viable route for its experimental detection.

Keywords: Strain; Hall viscosity; Altermagnet