TY - JOUR
T1 - Raman scattering study of electron-doped PrxCa 1-xFe2As2 superconductors
AU - Litvinchuk, A. P.
AU - Lv, Bing
AU - Chu, C. W.
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/9/14
Y1 - 2011/9/14
N2 - Temperature-dependent polarized Raman spectra of electron-doped superconducting PrxCa1-xFe2As2 (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.
AB - Temperature-dependent polarized Raman spectra of electron-doped superconducting PrxCa1-xFe2As2 (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.
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U2 - 10.1103/PhysRevB.84.092504
DO - 10.1103/PhysRevB.84.092504
M3 - Article
AN - SCOPUS:80053543962
SN - 1098-0121
VL - 84
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 9
M1 - 092504
ER -