Spin splitting and anisotropy of cyclotron resonance in the conduction band of GaAs

The recently observed spin splitting and anisotropy of cyclotron resonance in the conduction band of GaAs is quantitatively explained using a conduction-band Hamiltonian derived from a 14×{}14 k{·}p model together with an established parameter set. We thus demonstrate the importance of remote band contributions in the valence-band part of the Hamiltonian, which have been neglected so far.