Evidence of linear Zeeman effect for infrared intracenter transitions in boron doped diamond in high magnetic fields

We present low temperature infrared study of the boron-doped IIb-type synthetic diamond by means of Fourier transform spectroscopy. Boron-related intracenter transition between the ground and excited odd-parity states was investigated up to exceptionally high magnetic fields of 32T. The absorption mode at 2800cm−1 (347meV) revealed clear Zeeman splitting. The splitting exhibits linear behaviour up to maximal fields, which is contrary to other elemental semiconductors doped by hydrogen-like shallow acceptor centers.