Doping and temperature dependence of Raman scattering from NdFeAsO1-x Fx (x=0-0.2) superconductor

Ling Zhang, T. Fujita, F. Chen, D. L. Feng, S. Maekawa, M. W. Chen

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

Raman spectra of superconductor NdFeAsO1-x Fx (x=0.0,0.1,0.2) compounds have been systematically investigated as functions of temperature and fluorine concentration. It was found that fluorine doping leads to structure disorder of insulator Nd-O layers and detectable downshift as well as increased temperature coefficients of the Fe-As vibrational modes. Additionally, low-temperature Raman measurements reveal that the in-plane phonon modes of the layered compound are unusually more sensitive to temperature change than those along the axis, and this anisotropic temperature dependence of phonon models is further enhanced by fluorine doping.

Original languageEnglish
Article number052507
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number5
DOIs
Publication statusPublished - 2009 Feb 26

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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