Infrared and Raman spectra of LiV2O5 single crystals

Abstract

The phonon dynamics of LiV2O5 single crystals is studied using infrared and Raman spectroscopy techniques. The infrared-active phonon frequencies and dielectric constants are obtained by oscillator fitting procedure of the reflectivity data measured at room temperature. The Raman scattering spectra are measured at room temperature and at T=10 K in all nonequivalent polarized configurations. The assignment of the phonons is done by comparing the infrared and Raman spectra of LiV2O5 and NaV2O5. The factor-group-analysis of the LiV2O5 crystal symmetry and of its constituent layers is performed to explain the symmetry properties of the observed modes. We concluded that layer symmetry dominates in the vibrational properties of this compound.

arXiv comment10 pages, 5 figures

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• Surprises on the Way from 1D to 2D Quantum Magnets: the Novel Ladder Materials
• NaV_2O_5 as a quarter-filled ladder compound
• A new view of the electronic structure of the spin-Peierls compound alpha'-NaV2O5
• Raman, infrared and optical spectra of the spin-Peierls compound NaV_2O_5
• Spin gap behavior and charge ordering in α^{\prime}-NaV_2O_5 probed by light scattering
• First evidence for charge ordering in NaV${}_2$O${}_5$ from Raman spectroscopy
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Cited by in corpus (5)

• Magneto-Dielectric Effect in the S = 1/2 Quasi-Two Dimensional Antiferromagnet K2V3O8
• Raman scattering study of charge ordering in beta-Ca0.33V2O5
• Coupling of spin and lattice modes in the S=1/2 two-dimensional antiferromagnet K${}_2$V${}_3$O${}_8$ with magneto-dielectric couplings
• Charge-ordering and optical transitions of LiV2O5 and NaV2O5
• Charge kinks as Raman scatterers in quarter-filled ladders