Title
Raman scattering study of phonon and spin modes in <tex>$(TMTSF)_{2}PF_{6}$</tex> Raman scattering study of phonon and spin modes in <tex>$(TMTSF)_{2}PF_{6}$</tex>
Author
Publication type
article
Publication
Lausanne ,
Subject
Physics
Chemistry
Source (journal)
Synthetic metals. - Lausanne
Volume/pages
124(2001) :2-3 , p. 421-429
ISSN
0379-6779
ISI
000172608000025
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We have studied polarized Raman spectra of bis-(tetramethyltetraselenafulvalene)hexafluorophosphate ((TMTSF)(2)PF6) single crystals in the wide spectral and temperature range using different laser energies. We observed and assigned 23 Raman active modes. The carbon C=C in-phase and out-of-phase stretching modes at 1464 and 1602 cm(-1) show strong electron molecular vibration (EMV) coupling. The mode at about 1565 cm(-1) is temperature independent below 50 K due to the methyl group motion freezing. For (TMTSF)(2)PF6 in the spin density wave (SDW) phase for a temperature induced dimensionality 1D (quarter-filled dimerized linear chain with correlated electrons) the spin gapless magnon spectra have been calculated. No evidence of spin-lattice coupling or spin-related modes is found in the Raman spectra in the spin density wave (SDW) phase. (C) 2001 Elsevier Science B.V All rights reserved.
E-info
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