Electronic structure of spheroidal fullerenes in a weak uniform magnetic   field: a continuum field-theory model
  The effect of a weak uniform magnetic field on the electronic structure of slightly deformed fullerene molecules is studied within the continuum field-theory model. It is shown how the existing due to spheroidal deformation fine structure of the electronic energy spectrum modifies in the presence of the magnetic field. Hyperfine splitting of the energy-levels dictated by the topological defects is also influenced by the weak external magnetic field. Exact analytical solutions for zero-energy modes are found. 
M. Pudlak, R. Pincak and V.A. Osipov