Raman evidence for orbiton-mediated multiphonon scattering in multiferroic TbMnO3
Data(s) |
01/03/2010
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Resumo |
Temperature-dependent Raman spectra of TbMnO3 from 5 to 300 K in the spectral range of 200-1525 cm(-1) show five first-order Raman allowed modes and two high frequency modes. The intensity ratio of the high frequency Raman band to the corresponding first-order Raman mode is nearly constant and high (similar to 0.6) at all temperatures, suggesting an orbiton-phonon mixed nature of the high frequency mode. One of the first-order phonon modes shows anomalous softening below T-N (similar to 46 K), suggesting a strong spin-phonon coupling. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/26394/1/0953-8984_22_11_115403.pdf Kumar, Pradeep and Saha, Surajit and Muthu, DVS and Sahu, JR and Sood, AK and Rao, CNR (2010) Raman evidence for orbiton-mediated multiphonon scattering in multiferroic TbMnO3. In: Journal of Physics: Condensed Matter, 22 (11). |
Publicador |
Institute of Physics. |
Relação |
http://iopscience.iop.org/0953-8984/22/11/115401 http://eprints.iisc.ernet.in/26394/ |
Palavras-Chave | #Physics |
Tipo |
Journal Article PeerReviewed |