Abstract:
The structure of GaP films grown by molecular-beam epitaxy on vicinal Si(1113) substrates has been studied by X-ray diffraction. It is established that the crystalline lattice of a pseudomorphic film rotates about the $\langle$110$\rangle$ axis toward increasing deviation from the singular orientation, while the subsequent relaxation leads to rotation in the opposite direction. This is valid for the films of both (001) and (00$\bar1$) polarities. Differences between the surface morphologies of relaxed and pseudomorphic GaP films are revealed.