Raman spectroscopy of RFeAsO (R =Sm, La)

V. G. Hadjiev; M. N. Iliev; K. Sasmal; Y. Y. Sun; C. W. Chu

doi:10.1103/PhysRevB.77.220505

Raman spectroscopy of RFeAsO (R =Sm, La)

V. G. Hadjiev, M. N. Iliev, K. Sasmal, Y. Y. Sun, C. W. Chu

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Abstract

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.

Original language	English
Article number	220505
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	77
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.77.220505
Publication status	Published - 2008 Jun 13

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.77.220505

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title = "Raman spectroscopy of RFeAsO (R =Sm, La)",

abstract = "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.",

author = "Hadjiev, {V. G.} and Iliev, {M. N.} and K. Sasmal and Sun, {Y. Y.} and Chu, {C. W.}",

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language = "English",

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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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JF - Physical Review B - Condensed Matter and Materials Physics

IS - 22

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ER -

Raman spectroscopy of RFeAsO (R =Sm, La)

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