A study of the electronic structure of α-NaV₂O₅ using angular-resolved soft X-ray spectroscopy

Author

Gerald Woods, University of Tennessee

Date of Award

12-2001

Degree Type

Dissertation

Degree Name

Doctor of Philosophy

Major

Physics

Major Professor

Tom Callcott

Committee Members

David Mandrus, Marianne Breinig, Bob Compton

Abstract

In this dissertation, we use soft x-ray spectroscopy to investigate the electronic structure of the highly anisotropic, strongly correlated transition-metal oxide d.-NaV 2O5. Band structure calculations and theoretical modeling of V-V correlation effects were employed to assist in the interpretation of the experimental data. Our results show that NaV2O5 is a Mott-Hubbard insulator in which the V d-band spanning the Fenni level is split into lower and upper Hubbard bands by strong correlation effects. Resonance inelastic x-ray scattering (RIXS) measurements provide a direct measure of the d-d* excitations between the bands and show that the distance between the centroids of the bands is 1.55 ±.. 0.05 e V.

Recommended Citation

Woods, Gerald, "A study of the electronic structure of α-NaV₂O₅ using angular-resolved soft X-ray spectroscopy. " PhD diss., University of Tennessee, 2001.
https://trace.tennessee.edu/utk_graddiss/6469