Optical properties and electronic structure of αNa1xCaxV2O5

C. Presura, D. van der Marel, M. Dischner, C. Geibel, and R. K. Kremer
Phys. Rev. B 62, 16522 – Published 15 December 2000
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Abstract

The dielectric function of αNa1xCaxV2O5 (0<~x<~20%) was measured for the a and b axes in the photon energy range 0.8–4.5 eV at room temperature. By varying the Ca concentration we control the relative abundancy of V4+ and V5+. We observe that the intensity of the main optical absorption peak at 1 eV is proportional to the number of V5+ ions. This rules out the interpretation as a V4+ dd excitation, and it establishes that this is the on-rung bonding-antibonding transition.

  • Received 31 May 2000

DOI:https://doi.org/10.1103/PhysRevB.62.16522

©2000 American Physical Society

Authors & Affiliations

C. Presura1, D. van der Marel1, M. Dischner2, C. Geibel2, and R. K. Kremer3

  • 1Solid State Physics Laboratory, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
  • 2Max-Planck-Institut für Chemische Physik fester Stoffe, D-01187 Dresden, Germany
  • 3Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany

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Vol. 62, Iss. 24 — 15 December 2000

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