TY - JOUR
T1 - Raman spectroscopy of RFeAsO (R =Sm, La)
AU - Hadjiev, V. G.
AU - Iliev, M. N.
AU - Sasmal, K.
AU - Sun, Y. Y.
AU - Chu, C. W.
PY - 2008/6/13
Y1 - 2008/6/13
N2 - We report the polarized Raman spectra of undoped RFeAsO (R =Sm, La) collected at room temperature from ab surfaces of impurity-free microcrystals. The spectra exhibit sharp phonon lines on very weak electronic scattering background. The frequency and symmetry of the four Raman phonons involving out-of-plane atomic vibrations are found at 170 cm-1 (A1g, Sm), 201 cm-1 (A1g, As), 208 cm-1 (B1g, Fe), and 345 cm-1 (B1g, O) for SmFeAsO; and 162 cm-1 (A1g, La), 208 cm-1 (A1g, As), 201 cm-1 (B1g, Fe), and 316 cm-1 (B1g, O) for LaFeAsO.
AB - We report the polarized Raman spectra of undoped RFeAsO (R =Sm, La) collected at room temperature from ab surfaces of impurity-free microcrystals. The spectra exhibit sharp phonon lines on very weak electronic scattering background. The frequency and symmetry of the four Raman phonons involving out-of-plane atomic vibrations are found at 170 cm-1 (A1g, Sm), 201 cm-1 (A1g, As), 208 cm-1 (B1g, Fe), and 345 cm-1 (B1g, O) for SmFeAsO; and 162 cm-1 (A1g, La), 208 cm-1 (A1g, As), 201 cm-1 (B1g, Fe), and 316 cm-1 (B1g, O) for LaFeAsO.
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U2 - 10.1103/PhysRevB.77.220505
DO - 10.1103/PhysRevB.77.220505
M3 - Article
AN - SCOPUS:45349105305
VL - 77
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 22
M1 - 220505
ER -