Title: Phonon dynamics in AV(2)O(5) (A=Na,Ca,Mg,Cs) oxides
Authors: Popovic, ZV ×
Konstantinovic, MJ
Gajic, R
Popov, VN
Isobe, M
Ueda, Y
Moshchalkov, Victor #
Issue Date: 2002
Series Title: Physical review. B, Condensed matter and materials physics vol:65 issue:18 article number:184303
Abstract: The phonon dynamics of the spin-ladder vanadium oxides AV(2)O(5) (A=Na,Ca,Mg,Cs) is studied using infrared and Raman spectroscopy techniques. The infrared-active phonon frequencies are obtained by Kramers-Kronig analysis of the reflectivity data. The assignment of the phonon modes in (Ca,Mg,Cs)V2O5 is based on the shell model lattice dynamical calculation of alpha(')-NaV2O5. The large phonon frequency (448 cm(-1)) renormalization in the sodium-deficient samples is found to be similar to the resonant-induced phonon renormalization in the nominally pure alpha(')-NaV2O5. In the Raman spectra of CaV2O5 and MgV2O5 we observed the phonon overtones and combinational lines up to the fourth order. No spin-related modes are found in CsV2O5.
ISSN: 1098-0121
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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