Dresden 2026 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 98: Altermagnets
TT 98.4: Vortrag
Freitag, 13. März 2026, 10:15–10:30, CHE/0091
Alterelectrics: The Electric Counterpart of Altermagnets — •Viktor Könye1, Amber Visser1, Oleg Janson2, Jeroen van den Brink2, Corentin Coulais1, and Jasper van Wezel1 — 1University of Amsterdam — 2IFW Dresden
Altermagnets are a new class of materials that mix features of both ferromagnets and antiferromagnets. They have spin-split bands like ferromagnets but still show no net magnetization. Their underlying symmetries also lead to unusual effects, such as a strong piezomagnetic effect and hyperbolic wave dispersion. This raises an important question: which of these behaviors actually come from magnetism, and which are simply a result of symmetry? In this work, we separate these two aspects by proposing a non-magnetic analogue of an altermagnet, built from polarized chains. These ''alterelectrics'' show anisotropic piezoelectricity and surface states with hyperbolic wave dispersion, demonstrated through a simple model. Instead of spin-split bands, the electronic states localize on opposite surfaces, producing strongly anisotropic, surface-dependent transport.
Keywords: altermagnets; polarization; electric transport; surface states; topological insulators