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- W1964705936 abstract "The electronic structure of various nickel oxides with nickel valence varying from 1+ to 3+ was investigated with the aim to find similarities and differences to the isoelectronic cuprates. Only if the Ni ions are forced into a planar coordination with the O ions can a $S=1/2$ magnetic insulator be realized with the difficult ${mathrm{Ni}}^{+}$ oxidation state and possibly doped with low spin $(S=0){mathrm{Ni}}^{2+}$ holes directly analogous to the superconducting cuprates. The more common ${mathrm{Ni}}^{3+}$ oxidation state cannot be used to make a parent magnetic insulator as it forms rather as localized $S=1 {mathrm{Ni}}^{2+}$ embedded in a sea of itinerant O holes. Strong coupling of these holes to the localized spins via $2pensuremath{-}3d$ hybridization leads to a heavy-fermion system with a large Kondo temperature, which was confirmed experimentally for ${mathrm{LaNiO}}_{3}.$" @default.
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- W1964705936 date "1999-03-15" @default.
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- W1964705936 title "Electronic structure of possible nickelate analogs to the cuprates" @default.
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- W1964705936 doi "https://doi.org/10.1103/physrevb.59.7901" @default.
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