Ferro-spinetic Altermagnets from Electronic Correlations

Datum

14.10.2025

Zeit

11:00 - 12:00

Sprecher

Dr. Toshihiro Sato

Zugehörigkeit

IFW Dresden / ITF

Sprache

en

Hauptthema

Materialien

Host

Grit Rötzer

Beschreibung

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

Letztmalig verändert: 14.10.2025, 06:11:33