Raman scattering study of electron-doped PrxCa1−xFe2As2 superconductors
A. P. Litvinchuk, Bing Lv, C. W. Chu
DOI 10.1103/PhysRevB.84.092504 · Physical Review B
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Abstract
Temperature-dependent polarized Raman spectra of electron-doped superconducting PrxCa1−xFe2As2 (x≈0.12) single crystals are reported. All four even-parity phonons allowed by symmetry are identified. The phonon mode of B1g symmetry at 222 cm−1, which is associated with the c-axis motion of Fe ions, is found to exhibit an anomalous frequency hardening at low temperatures, that signals nonvanishing electron-phonon coupling in the superconducting state and implies that the superconducting gap magnitude 2Δc<27 meV.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| PrxCa1-xFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 49 | Pressure not reported | unknown |
| PrxCa1-xFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 21 | Pressure not reported | unknown |
| KxBa1-xFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38 | Pressure not reported | unknown |
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