Semiconductor Physics, Quantum Electronics & Optoelectronics. 2003. V. 6, N 1. P. 28-31.
Energy levels of rare-earth
ions in crystal lattice sites of cubic symmetry
Van der Waals-Zeeman Institute, University of Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands
Abstract. Numerical calculations are presented for the energy levels of the rare-earth
ion Er3+ in a crystalline field of cubic symmetry. A distinction is made between
the five different point groups within the system of cubic symmetry. Traditionally
only the point groups O, Oh and Td are considered. As an extension, in
the present analysis the effect of an additional crystal-field term appearing
for the cubic point groups T and Th is explored.
rare-earth ions, crystal-field theory.