Fig. 7: Symmetry operations responsible for the altermagnetic character of Ca3Ru2O7 in the B magnetic configuration.
From: Hybrid d/p-wave altermagnetism in Ca3Ru2O7 and strain-controlled spin splitting
\({\mathcal{T}}\) denotes the time-reversal operator, which interchanges spin-up and spin-down states, represented by red and blue spheres, respectively. a Configuration B. b Spin exchange between spin-up and spin-down via {\mathcal{T}}. c Half-unit-cell translation along the x axis (x → x + 0.5). d Screw symmetry operation with z → −z. e Half-unit-cell translation along the z axis. f Summary of combined nonsymmorphic operations yielding k-dependent splitting states.
