The magnetic field due to a single vortex in anisotropic type-II superconductors with cubic crystal symmetry is calculated at $T=0\mathrm{}$°K by means of the boson method. The results for the magnetic field are used in our analysis of stable orientation of the flux-line lattice with respect to the crystal lattice. The theoretical results agree well with the stable orientation of the flux-line lattice observed in weak-field region in Nb and Pb-Tl at low temperature. The boson characteristic function for cubic superconductors is also presented.

• Received 7 November 1978

DOI:https://doi.org/10.1103/PhysRevB.20.918