Abstract:

A calculation of the spin-orbit splitting of the energy levels at the corner of the Brillouin zone in Mg isperformed using a six orthogonalized-plane-wave approximation. The parameters of the wave functionswere taken from an existing calculation by one of the authors. The corresponding splittings for Be, Zn,Cd, and Tl are estimated from spectroscopic values of the atomic splittings. The changes in the topologicalproperties of the Fermi surface caused by the spin-orbit splitting are discussed as well as the implications ofthese changes for various physical properties. 

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