Statut | Confirmé |
Série | SEM-BESSON |
Domaines | cond-mat |
Date | Lundi 11 Mai 2009 |
Heure | 10:30 |
Institut | IMPMC |
Salle | Salle de Conférence, Bâtiment 15,140 rue de Lourmel, 75015 Paris |
Nom de l'orateur | Mazin |
Prenom de l'orateur | Igor |
Addresse email de l'orateur | |
Institution de l'orateur | Naval Research Laboratories |
Titre | Electronic structure, superconductivity and magnetism in ferropnictides |
Résumé | There is growing evidence that the newly discovered high-Tc superconductivity in ferropnictides is intimately related to their unique magnetic properties. In the first part of the talk I will discuss the electronic structure of ferropnictides as it emerges from the density functional calculations, and will show that this electronic structure strongly favors a new unconventional superconducting state with an s-wave angular dependence of the gap, but with a sigh-changing order parameter. I will also discuss experimental evidence for and against this state, as well as potential experiments that can provide decisive evidence to this effect. In the second part of the talk I will argue for strong incipient antiferromagnetism in both parent and superconducting ferropnictides and discuss several hypotheses about why this strong magnetism has not been observed, or observed at a much weaker level, in the available experiments. |
Numéro de preprint arXiv | |
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