Semiconductor Physics, Quantum Electronics & Optoelectronics. 2003. V. 6, N 1. P. 28-31.

PACS: 71.70.C

Energy levels of rare-earth ions in crystal lattice sites of cubic symmetry
C.A.J. Ammerlaan

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.

Keywords: Er3+, rare-earth ions, crystal-field theory.
Paper received 28.12.02; accepted for publication 18.03.03.

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