Superconducting gaps via Raman scattering in iron superconductors
Chandan Setty, Jiangping Hu
DOI 10.1103/PhysRevB.89.180509 · Physical Review B
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Abstract
We investigate the nonresonant Raman response for iron-based superconductors using the framework of an effective S4 model that was recently proposed to capture the essential electronic and magnetic properties of iron-based superconductors. We compute the momentum matrix elements and the resulting Raman vertices exactly for different polarization geometries and find that a simple coskxcosky superconducting gap function is in good agreement with experimental data measured in both iron pnictides and iron chalcogenides. The Raman peaks are also matched quantitatively with the measured superconducting gaps by other experimental techniques. The result strengthens the validity of the S4 model and the dominance of the s-wave pairing for iron-based superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Rb0.8Fe1.6Se2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ba(Fe1-xCox)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ba0.6K0.4Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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