Dependence of the Excitation Energies of Boron in Diamond on Isotopic Mass

Kim et al. have reported a dependence of the infrared excitation energies of boron acceptors in diamond on the isotopic mass of the carbon atoms. We show that this change can be quantitatively interpreted as induced by a change in the hole effective mass. Keywords: A. Diamond, A. Stable isotopes, D. Acceptor binding energies, D. Effective masses of holes