Electronic Properties of BaFe$_2$As$_2$ upon Doping and Pressure: The Prominent Role of the As $\it p$ Orbitals
Résumé
Using high-resolution, lifetime removed, x-ray absorption spectroscopy at the As $\it K$ edge, we evidence
the strong sensitivity of the As electronic structure upon electron doping with Co or pressure change in
BaFe$_2$As$_2$ at room temperature. Our results unravel the prominent role played by As$\it 4p$ orbitals in the
electronic properties of the Fe pnictide superconductors. We propose a unique picture to describe the
overall effect of both external parameter doping and pressure, resolving the apparent contradiction between
angle-resolved photoemission spectroscopy, transport, and absorption results, with the As$\it p$ states as a key
ingredient
Domaines
Physique [physics]Origine | Fichiers éditeurs autorisés sur une archive ouverte |
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