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Surface Geometric and Electronic Structure of BaFe2As2(001)
- Publication Year :
- 2009
-
Abstract
- BaFe2As2 exhibits properties characteristic of the parent compounds of the newly discovered iron (Fe)-based high-TC superconductors. By combining the real space imaging of scanning tunneling microscopy/spectroscopy (STM/S) with momentum space quantitative Low Energy Electron Diffraction (LEED) we have identified the surface plane of cleaved BaFe2As2 crystals as the As terminated Fe-As layer - the plane where superconductivity occurs. LEED and STM/S data on the BaFe2As2(001) surface indicate an ordered arsenic (As) - terminated metallic surface without reconstruction or lattice distortion. It is surprising that the STM images the different Fe-As orbitals associated with the orthorhombic structure, not the As atoms in the surface plane.<br />Comment: 12 pages, 4 figures
- Subjects :
- Condensed Matter - Materials Science
Condensed Matter - Superconductivity
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.0905.3194
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.103.076104