Figure 2

(a) Strain dependence of zero-field MA of the G-AFM Fe-terminated (left-hand coordinate, solid square) and the FM Rh-terminated surfaces/interfaces (right-hand coordinate, solid circle) for the FeRh/MgO bilayer. k-resolved MA (in erg/cm ²) in the quarter of the 2D BZ for the (b) G-AFM Fe-terminated and (c) FM Rh-terminated phases for η _FeRh  = −0.57%. Numerals refer to special BZPn (n = 1–4,1′–3′) k-points where the MA values are extrema. (d) Fe-terminated G-AFM phase under η _FeRh  = −0.57%: Low energies of the minority-spin Fe-d-derived orbitals relative to the Fermi energy (dashed horizontal line) at various BZPn for the interfacial, Fe _i , surface Fe _s , and central Fe _c atoms. (e) Rh-terminated FM phase under η _FeRh  = −0.57%: Low energies of the minority-spin d-derived orbitals of subsurface Fe _ss atom at BZP1′ and of the majority-spin d-derived orbitals of the surface Rh _s atom at BZP2′ and BZP3′, respectively. Red and blue vertical lines denote non-vanishing SOC matrix elements of the out-of (\({\hat{L}}_{z}\)) and in-plane (\({\hat{L}}_{x}\)) orbital angular momentum operator, respectively.