We report the F-doping dependence of 75As nuclear quadruple resonance frequency (75νQ) in the iron-oxypnictide LaFeAs(O1-xFx) (x = 0, 0.07, 0.08, 0.11 and 0.14). It was revealed that 75νQ becomes larger with increasing x up to 0.14. From point charge calculations, we found that experimental F-doping dependence of 75νQ cannot be accounted for by the effect of surrounding ions. Therefore, the on-site charge distribution at the 75As site modified by the hybridization between As-4p and Fe-3d orbitals gives dominant contribution to 75νQ in LaFeAs(O1-xFx).
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering