Infrared reflectivity spectra of η-Na1.3V2O5 in the charge disordered and ordered phase
We have measured the far-infrared reflectivity spectra of the sodium vanadium oxide η-Na1.3V2O5 polycrystals in the wide temperature (80–300 K) and frequency (150–1500 cm−1) range. Appearance of new phonon oscillators, phonon oscillator mode splitting and step-like shift of TO and LO frequencies at low temperatures are correlated with the charge-ordering phase transition, which takes place at about 120 K in this vanadium oxide.
Keywords: PACS 78.30.Hv Other nonmetallic inorganics - 63.20.D-Phonon states and bands ; normal modes ; and phonon dispersion - 71.30.+h Metal-insulator transitions and other electronic transitions - 71.27.+a Strongly correlated electron systems; heavy fermions
Record created on 2008-10-29, modified on 2016-08-08