Résumé
We have performed an angle-resolved photoemission spectroscopy study of BaCr2As2, which has the same crystal structure as BaFe2As2, a parent compound of Fe-based superconductors. We determine the Fermi surface of this material and its band dispersion over 5 eV of binding energy. Very moderate band renormalization (1.35) is observed for only two bands. We attribute this small renormalization to enhanced direct exchange as compared to Fe in BaFe2As2, and to a larger contribution of the eg orbitals in the composition of the bands forming the Fermi surface, leading to an effective valence count that is reduced by Fe d-As p hybridization.
| langue originale | Anglais |
|---|---|
| Numéro d'article | 184516 |
| journal | Physical Review B |
| Volume | 95 |
| Numéro de publication | 18 |
| Les DOIs | |
| état | Publié - 25 mai 2017 |
| Modification externe | Oui |
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