Fröhlich-interaction induced one-phonon Raman scattering in La 2CuO 4 using an infrared laser
The room-temperature Raman scattering from La 2CuO 4 is measured using a Fourier-transform spectrometer with an infrared laser. Due to the low energy of the laser, neither the two-magnon, nor the two-phonon scattering is observed, but a strong resonant one-phonon scattering is obtained. The seven pe...
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Published in | Solid state communications Vol. 112; no. 6; pp. 315 - 318 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
1999
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Subjects | |
Online Access | Get full text |
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Summary: | The room-temperature Raman scattering from La
2CuO
4 is measured using a Fourier-transform spectrometer with an infrared laser. Due to the low energy of the laser, neither the two-magnon, nor the two-phonon scattering is observed, but a strong resonant one-phonon scattering is obtained. The seven peak frequencies correspond to longitudinal optic (LO) phonons with both
E
u and
A
2u symmetry. The peaks correspond to phonons approximately halfway across the Brillouin zone, indicating a violation of wavevector conservation. |
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ISSN: | 0038-1098 1879-2766 |
DOI: | 10.1016/S0038-1098(99)00366-X |