Raman evidence for orbiton-mediated multiphonon scattering in multiferroic TbMnO3

Kumar, Pradeep; Saha, Surajit; Muthu, D V S; Sahu, J R; Sood, A K; Rao, C N R

dc.contributor.author	Kumar, Pradeep
dc.contributor.author	Saha, Surajit
dc.contributor.author	Muthu, D V S
dc.contributor.author	Sahu, J R
dc.contributor.author	Sood, A K
dc.contributor.author	Rao, C N R
dc.date.accessioned	2011-04-01T08:19:34Z
dc.date.available	2011-04-01T08:19:34Z
dc.date.issued	2010-03-24
dc.identifier	0953-8984	en_US
dc.identifier.citation	Journal of Physics-Condensed Matter 22(11), 1-5 (2010)	en_US
dc.identifier.uri	https://libjncir.jncasr.ac.in/xmlui/10572/91
dc.description	Restricted access.	en_US
dc.description.abstract	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.	en_US
dc.description.sponsorship	Department of Science and Technology, India, Council of Scientific and Industrial Research, India	en_US
dc.description.uri	http://dx.doi.org/10.1088/0953-8984/22/11/115403	en_US
dc.language.iso	en	en_US
dc.publisher	IOP Publishing Ltd	en_US
dc.rights	© 2010 IOP Publishing Ltd	en_US
dc.subject	Optical Phonons	en_US
dc.subject	LaMnO3	en_US
dc.subject	Excitations	en_US
dc.subject	Manganites	en_US
dc.subject	Raman Spectrascopy	en_US
dc.subject	Physics	en_US
dc.subject	Waves	en_US
dc.title	Raman evidence for orbiton-mediated multiphonon scattering in multiferroic TbMnO3	en_US
dc.type	Article	en_US