Ferro-spinetic Altermagnets from Electronic Correlations

Date

Oct 14, 2025

Time

11:00 AM - 12:00 PM

Speaker

Dr. Toshihiro Sato

Affiliation

IFW Dresden / ITF

Language

en

Main Topic

Materialien

Host

Grit Rötzer

Description

Altermagnets are fully compensated antiferromagnets that lack the combined time-reversal and translation symmetry. We show that their symmetry allows for a switchable ferro-spinetic polarization - the spin analogue of ferroelectricity - in a direction dictated by the lattice symmetry. We demonstrate this effect first in its purest form in an interacting altermagnetic fermion model, in which a many-body chiral symmetry forbids any charge polarization. Our quantum Monte Carlo simulations reveal edge-localized, reversible spin accumulations fully consistent with this symmetry locking. Breaking the chiral symmetry releases the charge sector: a ferroelectric polarization emerges orthogonal to the ferro-spinetic one, yielding mutually perpendicular switchable spin- and charge-polarized responses. We identify Mn-based metal-organic frameworks as realistic hosts for this effect, offering a practical route for experimental verification. .

Links

• Seminars at the IFW

Last modified: Oct 14, 2025, 6:11:33 AM