Magnetism, superconductivity, and pairing symmetry in iron-based superconductors
By A. Chubukov, D. Efremov, I. Eremin. 2008
387 citations recorded by the source corpus.
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.
Subfields: Accounting, Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/d00f4a592e3465e6036ac6738b134fae6c204003
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In Accounting
In Condensed Matter Physics
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Functional renormalization group approach to correlated fermion systems (2011, background): “The basic struc- 27 ture of the phase diagram with the sign-changing pairing gap between electron- and hole-pockets can be understood already from simplified few-patch RG approaches (Chubukov et al., 2008).”
- High-temperature superconductivity in iron-based materials (2010, background): “The intermediate (~T(3)) power laws, while consistent with a 2D line node model, can also arise in a s± symmetry model that accounts for disorder scattering, with exponential behavior in 1/T1 expected only at low-T [108].”