Unconventional superconductivity with a sign reversal in the order parameter of LaFeAsO1-xFx.

By I. Mazin, David J. Singh, Michael Johannes, M. Du. Physical Review Letters, 2008

1,602 citations recorded by the source corpus.

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.

Subfields: Accounting, Condensed Matter Physics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/a87fdb94b221780b459206c18afdd69062f22eae

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Citations in the corpus

A Quantum Critical Point Lying Beneath the Superconducting Dome in Iron Pnictides (2013, background): “[80] Mazin II, Singh DJ, Johannes MD, Du MH.”
Functional renormalization group approach to correlated fermion systems (2011, background): “As pointed out early (Kuroki et al., 2008; Mazin et al., 2008), there is approximate nesting of electron- and hole pockets which enhances particlehole susceptibilities with the wavevector connecting these pockets.”
Plain s-wave superconductivity in single-layer FeSe on SrTiO3 probed by scanning tunnelling microscopy (2015, background): “Up to now various pairing scenarios have been proposed for the iron-based superconductors with only electron pockets [10-19].”