Magnetism, superconductivity, and pairing symmetry in Fe-based superconductors

Simple item page
dc.creatorChubukov, A. V.
dc.creatorEfremov, D.
dc.creatorEremin, I.
dc.date2008-07-23
dc.date2008-09-05
dc.date.accessioned2026-07-07T10:08:51Z
dc.date.available2026-07-07T10:08:51Z
dc.descriptionWe analyze antiferromagnetism and superconductivity in novel $Fe-$based superconductors within the itinerant model of small electron and hole pockets near $(0,0)$ and $(π,π)$. We argue that the effective interactions in both channels logarithmically flow towards the same values at low energies, {\it i.e.}, antiferromagnetism and superconductivity must be treated on equal footings. The magnetic instability comes first for equal sizes of the two pockets, but looses to superconductivity upon doping. The superconducting gap has no nodes, but changes sign between the two Fermi surfaces (extended s-wave symmetry). We argue that the $T$ dependencies of the spin susceptibility and NMR relaxation rate for such state are exponential only at very low $T$, and can be well fitted by power-laws over a wide $T$ range below $T_c$.
dc.description12 pages, 9 figures. References added, the formula for the susceptibility corrected
dc.identifierhttps://arxiv.org/abs/0807.3735
dc.identifierhttp://arxiv.org/abs/0807.3735
dc.identifierPhys. Rev. B 78, 134512 (2008)
dc.identifierdoi:10.1103/PhysRevB.78.134512
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/171141
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleMagnetism, superconductivity, and pairing symmetry in Fe-based superconductors
dc.typetext

Files

Collections

arXiv