Nonlinear Phenomena in Complex Systems, 2017, Vol.20, No.2, pp.111-132

NONLINEAR PHENOMENA IN COMPLEX SYSTEMS
An Interdisciplinary Journal

2017, Vol.20, No.2, pp.111-132

Generalized Relativistic Effective Core Potentials for Lanthanides
Nikolai S. Mosyagin

Generalized Relativistic Effective Core Potentials (GRECPs) for lanthanides have been constructed where the 28 innercore 1s²2s²2p⁶3s²3p6³d¹⁰ electrons were excluded from the following GRECP calculations. Incorporation of Breit interactions in the GRECP operator has been illustrated on the example of the Sm atom. Atomic test calculations have demonstrated that the generated GRECPs allow one to carry out reliable calculations at the level of "chemical accuracy" (about 1 kcal/mol or 350 cm^-1 for the transition energies). A review of the calculations on lanthanide compounds with the present and earlier generated GRECPs has been given.

Key words: relativistic effective core potentials, relativistic pseudopotentials, calculations of electronic structure and properties of lanthanide compounds, accounting for Breit interactions, relativistic effects

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