Magnetism, superconductivity, and pairing symmetry in iron-based superconductors
TLDR
In this paper, the antiferromagnetism and superconductivity in novel Fe-based superconductors were analyzed in the itinerant model of small electron and hole pockets near 0,0 and, respectively, and the effective interactions in both channels logarithmically flow toward the same values at low energies.Abstract:
We analyze antiferromagnetism and superconductivity in novel Fe-based superconductors within the itinerant model of small electron and hole pockets near 0,0 and ,. We argue that the effective interactions in both channels logarithmically flow toward the same values at low energies; i.e., antiferromagnetism and superconductivity must be treated on equal footing. The magnetic instability comes first for equal sizes of the two pockets, but loses 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 a state are exponential only at very low T, and can be well fitted by power laws over a wide T range below Tc.read more
Citations
More filters
Journal ArticleDOI
Correlation strength, Lifshitz transition, and the emergence of a two-dimensional to three-dimensional crossover in FeSe under pressure
TL;DR: In this paper, a detailed theoretical study of the electronic structure, spectral properties, and lattice parameters of bulk FeSe under pressure using a fully charge selfconsistent implementation of the density functional theory plus dynamical mean field theory method (DFT+DMFT).
Journal ArticleDOI
Novel superconducting characteristics and unusual normal-state properties in iron-based pnictide superconductors: 57FeNMR and 75AsNQR/NMR studies in REFeAsO1−y (RE=La, Pr, Nd) and Ba0.6K0.4Fe2As2
TL;DR: In this paper, the superconducting properties of Fe-based pnictide superconductors were investigated by means of 57FeNMR and 75AsNQR/NMR.
Journal ArticleDOI
Inclusion of thiazyl radicals in porous crystalline materials.
Storm V. Potts,Storm V. Potts,Leonard J. Barbour,Delia A. Haynes,Jeremy M. Rawson,Jeremy M. Rawson,Gareth O. Lloyd +6 more
TL;DR: Both PXRD and EPR studies are consistent with retention of a π*-π* dimer motif for BDTA in MIL53(Al)@BDTA whereas MBDTA in Mil53( al)@MBDTA appears to be monomeric.
Journal ArticleDOI
FeTe 0.55 Se 0.45 : A multiband superconductor in the clean and dirty limit
TL;DR: The detailed optical properties of the multiband iron-chalcogenide superconductor (FeTe) have been studied in this article for light polarized in the $a\text{\ensuremath{-}}b$ planes.
Journal ArticleDOI
Multigap superconductivity in single crystals of Ba 0.65 Na 0.35 Fe 2 As 2 : A calorimetric investigation
Ashim Pramanik,Mahmoud Abdel-Hafiez,Saicharan Aswartham,Anja U. B. Wolter,Sabine Wurmehl,Vladislav Kataev,Bernd Büchner +6 more
TL;DR: In this article, the electronic properties and the superconducting gap characteristics of a single crystal of hole-doped 122 Fe-pnictide Ba were investigated by means of specific-heat measurements.
References
Related Papers (5)
Unconventional Superconductivity with a Sign Reversal in the Order Parameter of LaFeAsO 1-x F x
Density functional study of LaFeAsO(1-x)F(x): a low carrier density superconductor near itinerant magnetism.
David J. Singh,Mao-Hua Du +1 more