Back to Search
Start Over
Resonant inelastic x-ray scattering study of charge excitations in superconducting and nonsuperconducting PrFeAs01-y.
- Source :
-
Physical Review B: Condensed Matter & Materials Physics . Sep2012, Vol. 86 Issue 11, p1-4. 4p. - Publication Year :
- 2012
-
Abstract
- We report the first observation by momentum-resolved resonant inelastic x-ray scattering of charge excitations in an iron-based superconductor and its parent compound, PrFeAsO0.7 and PrFeAsO, respectively, with two main results. First, using calculations based on a 16-band dp model, we show that the energy of the lowest-lying excitations, identified as dd interband transitions of dominant xz, yz orbital character, exhibits a dramatic dependence on electron correlation. This enables us to estimate the Coulomb repulsion U and Hund's coupling J', and to highlight the role played by J in these peculiar orbital-dependent electron correlation effects. Second, we show that short-range antiferromagnetic correlations, which are a prerequisite to the occurrence of these excitations at the Γ point, are still present in the superconducting state. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10980121
- Volume :
- 86
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Physical Review B: Condensed Matter & Materials Physics
- Publication Type :
- Academic Journal
- Accession number :
- 83543120
- Full Text :
- https://doi.org/10.1103/PhysRevB.86.115104