Fig. 8: Effect of biaxial strain on structural and altermagnetic responses.
From: Hybrid d/p-wave altermagnetism in Ca3Ru2O7 and strain-controlled spin splitting
a Total energy variation as a function of biaxial strain (εab) for configurations A and B without spin–orbit coupling. b Evolution of the c-lattice parameter as a function of strain. c Variation of the altermagnetic merit quantity (AMQ), relative to the unstrained system, as defined in Eq. (3). Hexagons and triangles represent calculations performed under relaxed-structure (RS) and fixed-structure (FS) conditions, respectively, for configuration B. d Evolution of the RuO octahedral distortion angle (ϕ) for configurations A and B. Blue (red) shaded regions indicate strain ranges where the AM (AFM) phases are energetically favored.
