245 citations · 382 across the 11 of their papers we have counts for
11 papers
Raman scattering study of charge ordering in beta-Ca0.33V2O5
Z. V. Popovic, M. J. Konstantinovic, V. V. Moshchalkov +2
Polarized Raman spectra of the calcium vanadium oxide bronze beta-Ca0.33V2O5 are measured in the temperature range between 300 K and 20 K. The charge ordering phase transition at a…
Optical properties of NaxV2O5
M. J. Konstantinovic, Z. V. Popovic, V. V. Moshchalkov +4
The optical properties of sodium-deficient NaxV2O5 (0.85 < x <1) single crystals are analyzed in the wide energy range, from 0.012 to 4.5 eV, using ellipsometry, infrared reflectiv…
Evidence for Two Superconducting Gaps in
X. K. Chen, M. J. Konstantinovic, J. C. Irwin +2
We have measured the Raman spectra of polycrystalline MgB from 25 {\cm} to 1200 {\cm}. When the temperature was decreased below the superconducting transition temperature $T_…
Low-energy excitations in NaV2O5
M. J. Konstantinovic, J. C. Irwin, M. Isobe +1
In the (ab) polarized Raman scattering spectra of NaV2O5 single crystals, measured with 647.1 nm laser line at T < Tc, we found two modes at 86, and 126 cm-1 not previously reporte…
Optical studies of gap, hopping energies and the Anderson-Hubbard parameter in the zigzag-chain compound SrCuO2
Z. V. Popovic, V. A. Ivanov, M. J. Konstantinovic +8
We have investigated the electronic structure of the zigzag ladder (chain) compound SrCuO2 combining polarized optical absorption, reflection, photoreflectance and pseudo-dielectri…
Charge-ordering and optical transitions of LiV2O5 and NaV2O5
M. J. Konstantinovic, J. Dong, M. E. Ziaei +5
We present the measurements of the polarized optical spectra of NaV2O5 and LiV2O5. In an energy range from 0.5 to 5.5 eV we observe similar peaks in the E parallel a spectra of LiV…
Charge-ordering phase transition and order-disorder effects in the Raman spectra of NaV2O5
M. J. Konstantinovic, M. Isobe, Y. Ueda
In the ac polarized Raman spectra of NaV2O5 we have found anomalous phonon broadening, and an energy shift of the low-frequency mode as a function of the temperature. These effects…
Raman Scattering from Magnetic Excitations in the Spin Ladder Compounds CaV2O5 and MgV2O5
M. J. Konstantinovic, Z. V. Popovic, M. Isobe +1
We present the Raman-scattering spectra of CaV2O5 and MgV2O5. The magnetic contribution in the Raman spectra of CaV2O5 is found in the form of a strong asymmetric line, centered at…
Resonant Raman scattering in NaV2O5 as a probe of its electronic structure
M. J. Konstantinovic, Z. V. Popovic, T. Ruf +4
In order to investigate the origin of the phase transition observed in NaVO, as well as its electronic structure, we have measured Raman intensities as a function of the la…
First evidence for charge ordering in NaVO from Raman spectroscopy
M. J. Konstantinovic, Z. V. Popovic, A. N. Vasil'ev +2
We argue on the basis of symmetry selection rules and Raman scattering spectra that NaVO undergoes a charge ordering phase transition at T=34 K. Such a transition is ch…
Magnetic excitation spectra of
K. Ladavac, M. J. Konstantinovic, A. Belic +4
We present low temperature Raman spectra of single crystal. The assignation of the observed modes is done on the basis of Monte Carlo calculation of excited states of He…