Back to Search
Start Over
Point defects at cleaved Sr$_{n+1}$Ru$_n$O$_{3n+1}$(001) surfaces
- Source :
- Phys. Rev. B 90, 165438 (2014)
- Publication Year :
- 2018
-
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.
- Subjects :
- Condensed Matter - Materials Science
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 90, 165438 (2014)
- Publication Type :
- Report
- Accession number :
- edsarx.1804.04415
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.90.165438