Raman scattering study of electron-doped PrxCa 1-xFe2As2 superconductors

A. P. Litvinchuk, Bing Lv, C. W. Chu

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14 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number092504
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number9
DOIs
Publication statusPublished - 2011 Sep 14

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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