Experimental verification of EDSR in higher-symmetry antiferromagnets

Verify experimentally that an AC electric field induces spin-resonance transitions through the momentum-dependent transverse g-factor g_perp(p) in higher-symmetry Néel antiferromagnets subjected to a transverse magnetic field.

Background

The paper explains that higher-symmetry Néel antiferromagnets can retain doubly degenerate electron bands at special points in the Brillouin zone, where the transverse g-factor vanishes by symmetry. This makes the transverse g-factor momentum-dependent and produces a field-induced spin-orbit coupling, allowing an AC electric field to drive spin-resonance transitions.

Unlike the altermagnetic mechanism analyzed in detail in the paper, the corresponding resonance threshold in these antiferromagnets is governed by the longitudinal magnetic-field component. Demonstrating the predicted effect experimentally would establish EDSR as a practical means of distinguishing altermagnetic conductors from higher-symmetry antiferromagnets.

References

This also enables an AC electric field to induce spin resonance transitions by virtue of the momentum dependence of $g_\perp ({\mathbf p})$ . While this prediction is yet to be experimentally verified, magnetic quantum oscillations observed in two layered antiferromagnetic superconductors are fully consistent with the physics encapsulated in Eq. (\ref{eq:ZeemanSO}).

— Electric excitation of spin resonance in altermagnetic and antiferromagnetic conductors  (2608.25265 - Ramazashvili et al., 26 Aug 2026) in Discussion of higher-symmetry Néel antiferromagnets, immediately following Eq. (18)