图1. SrTiO₃单晶的倒易空间与衍射条件示意图

Fig.1. Schematics of reciprocal space and diffraction condition for the SrTiO₃ single crystal (2θ—diffraction angle, {\mathit{k}}_{\mathrm{i}}—incident vector of X-ray, {\mathit{k}}_{\mathrm{d}}—diffracted vector of X-ray, \mathit{S}—scattering vector)(a) reciprocal lattice points of reflections with [0v0] zone axis for the SrTiO₃ single crystal(b) Ewald construction of the symmetric SrTiO₃ (002) reflection(c) Ewald constructure of the asymmetric SrTiO₃ (103) reflection(d) range in reciprocal space which can be probed by \mathit{S}