Journal of Luminescence
One- and two-exciton states of pair centers of Kramers Nd3+ions in Nd-doped CaF2 and SrF2 crystals, and their possible use as qubits
Yu.V. Orlovskii, E.A. Vagapova, Viktor E. Peet, Elena Vinogradova, Leonid O. Dolgov, V. Boltrushko, V. Hizhnyakov