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- W2109475060 abstract "The Cu(I)-based delafossite structure, Cu(I)M(III)O(2), can accommodate a wide range of rare earth and transition metal cations on the M(III) site. Substitutional doping of divalent ions for these trivalent metals is known to produce higher p-type conductivity than that occurring in the undoped materials. However, an explanation of the conductivity anomalies observed in these p-type materials, as the trivalent metal is varied, is still lacking. In this article, we examine the electronic structure of Cu(I)M(III)O(2) (M(III)=Al,Cr,Sc,Y) using density functional theory corrected for on-site Coulomb interactions in strongly correlated systems (GGA+U) and discuss the unusual experimental trends. The importance of covalent interactions between the M(III) cation and oxygen for improving conductivity in the delafossite structure is highlighted, with the covalency trends found to perfectly match the conductivity trends. We also show that calculating the natural band offsets and the effective masses of the valence band maxima is not an ideal method to classify the conduction properties of these ternary materials." @default.
- W2109475060 created "2016-06-24" @default.
- W2109475060 creator A5001681469 @default.
- W2109475060 creator A5017503270 @default.
- W2109475060 creator A5055312881 @default.
- W2109475060 creator A5070174488 @default.
- W2109475060 date "2010-01-12" @default.
- W2109475060 modified "2023-10-10" @default.
- W2109475060 title "Understanding conductivity anomalies in CuI-based delafossite transparent conducting oxides: Theoretical insights" @default.
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