Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-09-19
J Raman Spectrosc 37, 591 (2006)
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 5 figures, 3 tables, submitted to Journal of Raman Spectroscopy
Scientific paper
10.1002/jrs.1484
We report on the first optical characterization of both cubic and hexagonal SrMnO$_3$. Room-temperature Raman spectra collected by means of a micro-Raman spectrometer are shown. The spectrum of the cubic compound is characterized by weak and broad bands in agreement with group-theory which predicts no Raman-active phonons for this compound. On the other hand, the spectrum of the hexagonal compound shows six narrow peaks ascribed to one-phonon processes. A complete polarization analysis of the spectra collected from a single crystallite allows us to completely assign the symmetries of the six observed peaks. Atomic displacements for each phonon peaks are also proposed.
Baldini Maria
Maignan Antoine
Martin Chris
Postorino Paolo
Sacchetti Andrea
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