Orbital-Resolved Soft X-Ray Spectroscopy in NaV2O5

Published

April 1, 2002

Author(s)

G P. Zhang, G T. Woods, Eric L. Shirley, T A. Callcott, L Lin, B. C. Sales, D Mandrus, G S. Chang, J He

Abstract

We demonstrate that angle-resolved soft x-ray spectroscopy can resolve absorption by inequivalent oxygen sites and by different orbitals belonging to the same site. By rotating the polarization direction, we see a dramatic change in the absorption spectra at the oxygen K edge in NaV₂ O₅. Our theory identifies the detailed composition of the spectra, and predicts a correct energy-ordering of the orbitals of three inequivalent oxygen atoms. Because different orbitals dominate absorption spectra at different energies, one can use this to excite the system at a specific orbital energy. In contrast, the vanadium edge does not show a big change when varying the polarization direction. The reason for this is that different excitation channels (involving different initial states for the excited electron) overlap in energy, and that the channels' polarization-dependent spectra vary in different, compensating ways, obscuring each channel's sensitive polarization dependence.

Citation

Physical Review B (Condensed Matter and Materials Physics)

Volume

65

Issue

No. 16

Pub Type

Journals

Keywords

NaV₂O₅, orbital, polarization, x-ray

Citation

Zhang, G. , Woods, G. , Shirley, E. , Callcott, T. , Lin, L. , Sales, B. , Mandrus, D. , Chang, G. and He, J. (2002), Orbital-Resolved Soft X-Ray Spectroscopy in NaV₂O₅, Physical Review B (Condensed Matter and Materials Physics) (Accessed July 18, 2024)