Eliashberg approach to infrared anomalies induced by the superconducting state of Ba0.68K0.32Fe2As2 single crystals
A. Charnukha, O. V. Dolgov, A. A. Golubov, Y. Matiks, D. L. Sun, C. T. Lin, B. Keimer, A. V. Boris
DOI 10.1103/PhysRevB.84.174511 · Physical Review B
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
We report the full complex dielectric function of high-purity Ba0.68K0.32Fe2As2 single crystals with Tc=38.5K determined by wideband spectroscopic ellipsometry at temperatures 10≤T≤300K. We discuss the microscopic origin of superconductivity-induced infrared optical anomalies in the framework of a multiband Eliashberg theory with two distinct superconducting gap energies, 2ΔA≈6kBTc and 2ΔB≈2.2kBTc. The observed unusual suppression of the optical conductivity in the superconducting state at energies up to 14kBTc can be ascribed to spin-fluctuation–assisted processes in the clean limit of the strong-coupling regime.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba0.68K0.32Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38.5 | Pressure not reported | unknown |
| Ba0.68K0.32Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38.5 | Pressure not reported | unknown |
| Ba0.68K0.32Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38.5 | Pressure not reported | unknown |
Similar papers
Specific Heat Measurements of Ba0.68K0.32Fe2As2 Single Crystals: Evidence for a Multiband Strong-Coupling Superconducting State
similarity 0.95P. Popovich et al.
Source status unknown — claims are unverified
Upper critical field, anisotropy, and superconducting properties of Ba1−xKxFe2As2 single crystals
similarity 0.94Zhao-Sheng Wang et al.
Source status unknown — claims are unverified
Experimental investigation of the suppressed superconducting gap and double-resonance mode in Ba1−xKxFe2As2
similarity 0.94S. Ideta et al.
Source status unknown — claims are unverified
Fully-gapped superconductivity in Ba0.55K0.45Fe1.95Co0.05As2: A low-temperature specific heat study
similarity 0.94K. Gofryk et al.
Source status unknown — claims are unverified
Spin excitation anisotropy in the optimally isovalent-doped superconductor BaFe2(As0.7P0.3)2
similarity 0.94Ding Hu et al.
Source status unknown — claims are unverified
Power-law-like correlation between condensation energy and superconducting transition temperatures in iron pnictide/chalcogenide superconductors: Beyond the BCS understanding
similarity 0.94Jie Xing et al.
Source status unknown — claims are unverified