TY - JOUR
T1 - Doping and temperature dependence of Raman scattering from NdFeAsO1-x Fx (x=0-0.2) superconductor
AU - Zhang, Ling
AU - Fujita, T.
AU - Chen, F.
AU - Feng, D. L.
AU - Maekawa, S.
AU - Chen, M. W.
PY - 2009/2/26
Y1 - 2009/2/26
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.79.052507
DO - 10.1103/PhysRevB.79.052507
M3 - Article
AN - SCOPUS:62349117799
VL - 79
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 5
M1 - 052507
ER -