Strain-induced Defect Superstructure on the SrTiO3(110) Surface

Abstract

We report on a combined scanning tunneling microscopy and density functional theory calculation study of the SrTiO3(110)-(4 x 1) surface. It is found that antiphase domains are formed along the [1-10]-oriented stripes on the surface. The domain boundaries are decorated by defects pairs consisting of Ti2O3 vacancies and Sr adatoms, which relieve the residual stress. The formation energy of, and interactions between, vacancies result in a defect superstructure. It is suggested that the density and distributions of defects can be tuned by strain engineering, providing a fexible platform for the designed growth of complex oxide materials.

References in corpus (7)

• Unveiling a two-dimensional electron gas with universal subbands at the surface of SrTiO3
• Creation and control of a two-dimensional electron liquid at the bare SrTiO3 surface
• Stability and electronic structure of the $(1\times 1)$ SrTiO${}_3$(110) polar surfaces by first principles calculations
• High mobility conduction at (110) and (111) LaAlO3/SrTiO3 interfaces
• Unexpected Anisotropic Two Dimensional Electron Gas at the LaAlO3/SrTiO3 (110) Interface
• Evolution of the Surface Structures on SrTiO${}_3$(110) Tuned by Ti or Sr Concentration
• Reversible Transition Between Thermodynamically Stable Phases with Low Density of Oxygen Vacancies on SrTiO${}_3$(110) Surface

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• Water Adsorption at the Tetrahedral Titania Surface Layer of SrTiO${}_3$(110)-(4$\times$1)
• Transition from reconstruction towards thin film on the (110) surface of strontium titanate
• High chemical activity of a perovskite surface: reaction of CO with Sr${}_3$Ru${}_2$O${}_7$
• Vacancy clusters at domain boundaries and band bending at the SrTiO${}_3$(110) surface
• Stabilizing Single Ni adatoms on a Two-dimensional Porous Titania Overlayer at the SrTiO${}_3$(110) Surface
• In-situ real-space imaging of crystal surface reconstruction dynamics via electron microscopy