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[Fizinfo] BME Elm. Fiz. Szeminárium, dec. 12. Könye Viktor

From: Janos Asboth <asboth.janos AT ttk.bme.hu>
To: fizinfo AT lists.kfki.hu, "elmfiz.oktatok-kutatok" <elmfiz.oktatok-kutatok AT lists.bme.hu>, elmfiz.hallgatok AT lists.bme.hu
Subject: [Fizinfo] BME Elm. Fiz. Szeminárium, dec. 12. Könye Viktor
Date: Wed, 10 Dec 2025 18:01:30 +0100
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Meghívó

BME Elméleti Fizika Szeminárium,

dec. 12. péntek 10h15,

1111 Budapest, Budafoki út 8., BME F III. magasföldszint 01.,
Elméleti Fizika Tanszék szemináriumi szoba

Könye Viktor (University of Amsterdam):
Alterelectrics: The Electric Counterpart of Altermagnets

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.

Minden érdeklődőt szeretettel várunk.
Asbóth János,
szemináriumi koordinátor

[Fizinfo] BME Elm. Fiz. Szeminárium, dec. 12. Könye Viktor, Janos Asboth, 12/10/2025