High chemical activity of a perovskite surface: reaction of CO with Sr${}_3$Ru${}_2$O${}_7$

Abstract

Adsorption of CO at the Sr${}_3$Ru${}_2$O${}_7$(001) surface was studied with low-temperature scanning tunneling microscopy (STM) and density functional theory. In situ cleaved single crystals terminate in an almost perfect SrO surface. At 78 K, CO first populates impurities and then adsorbs above the apical surface O with a binding energy E${}_{\mathrm{ads}}$=-0.7 eV. Above 100 K, this physisorbed CO replaces the surface O, forming a bent CO2 with the C end bound to the Ru underneath. The resulting metal carboxylate (Ru-COO) can be desorbed by STM manipulation. A low activation (0.2 eV) and high binding (-2.2 eV) energy confirm a strong reaction between CO and regular surface sites of Sr${}_3$Ru${}_2$O${}_7$; likely, this reaction causes the "UHV aging effect" reported for this and other perovskite oxides.

References in corpus (11)

• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Complexity in Strongly Correlated Electronic Systems
• Fermi Surface, Surface States, and Surface Reconstruction in Sr2RuO4
• Imaging the evolution of metallic states in a spin-orbit interaction driven correlated iridate
• Heavy d-Electron Quasiparticle Interference and Real-space Electronic Structure of Sr3Ru2O7
• Water Adsorption at the Tetrahedral Titania Surface Layer of SrTiO${}_3$(110)-(4$\times$1)
• Strain-induced Defect Superstructure on the SrTiO3(110) Surface
• Cleaving-temperature dependence of layered-oxide surfaces
• Surface and Bulk Structural Properties of Single Crystalline Sr3Ru2O7
• LDA+Slave-Boson approach to the correlated electronic structure of the metamagnetic bilayer ruthenate Sr${}_3$Ru${}_2$O${}_7$
• Unusual Fermi Surface Sheet-Dependent Band Splitting in Sr2RuO4 Revealed by High Resolution Angle-Resolved Photoemission

Cited by in corpus (10)

• High-resolution photoemission on Sr2RuO4 reveals correlation-enhanced effective spin-orbit coupling and dominantly local self-energies
• Adsorption of water at the SrO surface of ruthenates
• Quasiparticle Interference and Strong Electron-Mode Coupling in the Quasi-One-Dimensional Bands of Sr${}_2$RuO${}_4$
• Adsorption of CO on the Fe3O4(001) Surface
• Definition of design guidelines, construction and performance of an ultra-stable scanning tunneling microscope for spectroscopic imaging
• Point defects at cleaved Sr${}_{n+1}$Ru${}_n$O${}_{3n+1}$(001) surfaces
• Spin-orbit coupling induced Van Hove singularity in proximity to a Lifshitz transition in Sr${}_4$Ru${}_3$O${}_{10}$
• (Anti-)Altermagnetism from Orbital Ordering in the Ruddlesden-Popper Chromates Sr${}_{n+1}$Cr${}_n$O${}_{3n+1}$
• Hidden Phases Revealed at the Surface of Double-Layered Sr3(Ru1-xMnx)2O7
• Adsorption of CO on the Ca3Ru2O7(001) surface