Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2000-06-12
Physics
Condensed Matter
Strongly Correlated Electrons
8 pages in RevTex, 2 figure in EPS
Scientific paper
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.
Radwanski R. J.
Ropka Z.
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