2008/03/31 by I. I. Mazin, David J. Singh, D. J. Singh +3 · 2 citations
Business, Management and Accounting · Materials Science · Mathematics · Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Corporate Taxation and Avoidance #Ferromagnetism #Iron-based superconductors research #Mathematics #Order (exchange) #Pairing #Physics #Rare-earth and actinide compounds #Sign (mathematics) #Superconductivity #Superexchange #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.101.057003
published as Phys. Rev. Lett. 101, 057003 (2008)
openalex publication_date 2008/07/29 · arxiv created 2008/08/07 · arxiv updated 2015/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We argue that the newly discovered superconductivity in a nearly magnetic, Fe-based layered compound is unconventional and mediated by antiferromagnetic spin fluctuations, though different from the usual superexchange and specific to this compound. This resulting state is an example of extended s-wave pairing with a sign reversal of the order parameter between different Fermi surface sheets. The main role of doping in this scenario is to lower the density of states and suppress the pair-breaking ferromagnetic fluctuations.