Electric excitation of spin resonance in altermagnetic and antiferromagnetic conductors

Abstract: We predict electric-dipole spin resonance (EDSR) in altermagnetic conductors: in a magnetic field ${\mathbf H}<em>\perp$, perpendicular to the magnetization axis, an AC electric field will induce a \textit{spin} resonance peak above the lower threshold frequency $ω</em>- = 2H_\perp$. In sufficiently clean samples, this peak shall be clearly visible on the background of ohmic absorption. EDSR can thus serve as a diagnostic of altermagnetism in conducting materials and as a means to distinguish it from higher-symmetry antiferromagnetic order.