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Jahn-Teller-effect formation of the non-magnetic ground state for the d8 system

Z. Ropka·R. J. Radwanski
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Abstract

It is shown that the d8 electron system occurring in the Ni2+ ion can have the non-magnetic ground state in the atomic scale formed by the Jahn-Teller effect. The tetragonal/trigonal off-cubic lattice distortion for the octahedral site causes the splitting of the triplet 3A2g into a singlet-doublet structure with the non-magnetic singlet lying lower provided the intra-atomic spin-orbit coupling is taken into account.

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Z. Ropka, R. J. Radwanski. 2000-06-12. Jahn-Teller-effect formation of the non-magnetic ground state for the d8 system. https://arxiv.org/abs/cond-mat/0006196

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