Nematic Resonance in the Raman Response of Iron-Based Superconductors
Yann Gallais, Indranil Paul, Ludivine Chauvière, Jörg Schmalian
DOI 10.1103/PhysRevLett.116.017001 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
In a fully gapped superconductor the electronic Raman response has a pair-breaking peak at twice the superconducting gap Δ, if the Bogoliubov excitations are uncorrelated. Motivated by the iron based superconductors, we study how this peak is modified if the superconducting phase hosts a nematic-structural quantum critical point. We show that, upon approaching this point by tuning, e.g., doping, the growth of nematic correlations between the quasiparticles transforms the pair-breaking peak into a nematic resonance. The mode energy is below 2Δ, and stays finite at the quantum critical point, where its spectral weight is sharply enhanced. The latter is consistent with recent experiments on electron-doped iron based superconductors and provides direct evidence of nematic correlations in their superconducting phases.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BaFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 24.7 | Pressure not reported | unknown |
Similar papers
Superconducting gap and nematic resonance at the quantum critical point observed by Raman scattering in BaFe2(As1−xPx)2
similarity 0.94T. Adachi et al.
Source status unknown — claims are unverified
Nematic Susceptibility of Hole-Doped and Electron-Doped BaFe2As2 Iron-Based Superconductors from Shear Modulus Measurements
similarity 0.94A. E. Böhmer et al.
Source status unknown — claims are unverified
Raman-Scattering Detection of Nearly Degenerate s-Wave and d-Wave Pairing Channels in Iron-Based Ba0.6K0.4Fe2As2 and Rb0.8Fe1.6Se2 Superconductors
similarity 0.93F. Kretzschmar et al.
Source status unknown — claims are unverified
Superconductivity at 23 K and low anisotropy in Rb-substituted BaFe2As2 single crystals
similarity 0.93Z. Bukowski et al.
Source status unknown — claims are unverified
Nematic resonance in the Raman response of iron-based superconductors
similarity 0.93Gallais, Y. et al. · 2016 · arXiv:1504.04570
Source status unknown — claims are unverified
Anisotropy in the Electrical Resistivity and Susceptibility of Superconducting BaFe2As2 Single Crystals
similarity 0.93X. F. Wang et al.
Source status unknown — claims are unverified