KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
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AbstractFirst principles calculations, based on density functional theory, are used to investigate the structural and electronic properties of the epitaxial MgO(100)/SnO2(110) interface of wide band gap insulators. Depending on the interface termination, nonmagnetic metallic and half-metallic interface states are observed. The formation of these states is explained by a polar catastrophe model for nonpolar-polar interfaces. Strong lattice distortions and buckling develop in SnO2, which influence the interface properties as the charge discontinuity is partially screened. Already a single unit cell of SnO2 is sufficient to drive the polar catastrophe scenario. © 2016 The Royal Society of Chemistry.
CitationAlbar A, Schwingenschlögl U (2016) Polar catastrophe at the MgO(100)/SnO2(110) interface. J Mater Chem C 4: 11129–11134. Available: http://dx.doi.org/10.1039/c6tc04264c.
SponsorsThe research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).
PublisherRoyal Society of Chemistry (RSC)
JournalJ. Mater. Chem. C