Point defects at cleaved Sr${}_{n+1}$Ru${}_n$O${}_{3n+1}$(001) surfaces

Abstract

The (001) surfaces of cleaved Sr${}_3$Ru${}_2$O${}_7$ and Sr${}_2$RuO${}_4$ samples were investigated using low-temperature scanning tunneling microscopy and density functional theory calculations. Intrinsic defects are not created during cleaving. This experimental observation is consistent with calculations, where the formation energy for a Sr and O vacancy, 4.19 eV and 3.81 eV, respectively, is significantly larger than that required to cleave the crystal, 1.11 eV/(1 $\times$ 1) unit cell. Surface oxygen vacancies can be created through electron bombardment, however, and their appearance is shown to vary strongly with the imaging conditions. Point defects observed on as-cleaved surfaces result from bulk impurities and adsorption from the residual gas.

References in corpus (23)

• Complexity in Strongly Correlated Electronic Systems
• 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
• Transport Properties, Thermodynamic Properties, and Electronic Structure of SrRuO3
• Formation of a Nematic Fluid at High Fields in Sr3Ru2O7
• Fermi Surface, Surface States, and Surface Reconstruction in Sr2RuO4
• The ground state of Sr3Ru2O7 revisited; Fermi liquid close to a ferromagnetic instability
• (Sub)surface mobility of oxygen vacancies at the TiO${}_2$ anatase (101) surface
• Fermi surface and van Hove singularities in the itinerant metamagnet Sr3Ru2O7
• Electronic Structure and Fermiology of Sr${}_3$Ru${}_2$O${}_7$
• Imaging the evolution of metallic states in a spin-orbit interaction driven correlated iridate
• Evidence from Tunneling Spectroscopy for a Quasi-One Dimensional Origin of Superconductivity in Sr2RuO4
• Heavy d-Electron Quasiparticle Interference and Real-space Electronic Structure of Sr3Ru2O7
• Surface electronic structure of Sr2RuO4
• Water Adsorption at the Tetrahedral Titania Surface Layer of SrTiO${}_3$(110)-(4$\times$1)
• Multi-orbital physics in Fermi liquids prone to magnetic order
• Cleaving-temperature dependence of layered-oxide surfaces
• Surface and Bulk Structural Properties of Single Crystalline Sr3Ru2O7
• High chemical activity of a perovskite surface: reaction of CO with Sr${}_3$Ru${}_2$O${}_7$
• Complex electronic states in double layered ruthenates (Sr1-xCax)3Ru2O7
• Unusual Fermi Surface Sheet-Dependent Band Splitting in Sr2RuO4 Revealed by High Resolution Angle-Resolved Photoemission
• The effect of disorder on quantum phase transition in the double layered ruthenates (Sr1-xCax)3Ru2O7
• Effect of Cleaving Temperature on the Surface and Bulk Fermi Surface of Sr2RuO4 Investigated by High Resolution Angle-Resolved Photoemission

Cited by in corpus (7)

• Adsorption of water at the SrO surface of ruthenates
• Resolving the intrinsic short-range ordering of K${}^{+}$ ions on cleaved muscovite mica
• Magnetic-Field Tunable Intertwined Checkerboard Charge Order and Nematicity in the Surface Layer of Sr${}_2$RuO${}_4$
• Bulk and surface properties of the Ruddlesden-Popper oxynitride Sr${}_2$TaO${}_3$N
• Hidden Phases Revealed at the Surface of Double-Layered Sr3(Ru1-xMnx)2O7
• Adsorption of CO on the Ca3Ru2O7(001) surface
• Adsorption of a superoxo O2- species on the pure an Ca doped Sr3Ru2O7(001) surface