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
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Book ChapterDOI
The Antiferromagnetic Phase of Iron-Based Superconductors: An Itinerant Approach
Johannes Knolle,Ilya Eremin +1 more
Journal ArticleDOI
Coherence Effect in a Two-Band Superconductor: Application to Iron Pnictides
Keisuke Masuda,Susumu Kurihara +1 more
TL;DR: In this paper, the authors proposed an experimental method to determine the pairing symmetry of iron pnictides by using the two-band BCS model within the one-loop approximation.
Journal ArticleDOI
Strain-Stabilized (π, π) Order at the Surface of Fe1+xTe.
Chi Ming Yim,Chi Ming Yim,Soumendra Nath Panja,Christopher Trainer,Craig Topping,Christoph Heil,Alexandra S. Gibbs,Alexandra S. Gibbs,Alexandra S. Gibbs,Oxana V. Magdysyuk,Vladimir Tsurkan,Alois Loidl,Andreas W. Rost,Peter Wahl +13 more
TL;DR: In this article, the ground state of the nonsuperconducting parent compound, Fe1+xTe, of the iron chalcogenides by uniaxial strain was explored.
Journal ArticleDOI
The Signature of Weak Interband Coupling in Iron Pnictides: a Probe of the Superfluid Density
TL;DR: In this paper, the temperature evolution behaviors of the superfluid density in the iron-based superconductors based on the two-orbital t − J1 − J2 model were studied.
Journal ArticleDOI
Exploring multichannel superconductivity in ThFeAsN
TL;DR: In this article, the superconducting state of the undoped Fe-based superconductor ThFeAsN was investigated theoretically, and it was shown that spin fluctuations alone, when coupling only hole-like with electron-like energy bands, can account for a critical temperature up to $\ensuremath{\sim}7.5\phantom{\rule{0.16em}{0ex}}\mathrm{K}$ with an ${s}_{\ifmmode\pm\else\textpm\fi{}}$-wave superconding gap
References
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