Nature of electronic states at the Fermi level of metallic beta-PbO2 revealed by hard x-ray photoemission spectroscopy

Reference:

Payne, D. J., Egdell, R. G., Paolicelli, G., Offi, F., Panaccione, G., Lacovig, P., Monaco, G., Vanko, G., Walsh, A., Watson, G. W., Guo, J., Beamson, G., Glans, P. A., Learmonth, T. and Smith, K. E., 2007. Nature of electronic states at the Fermi level of metallic beta-PbO2 revealed by hard x-ray photoemission spectroscopy. Physical Review B, 75 (15), 153102.

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Official URL:

http://dx.doi.org/10.1103/PhysRevB.75.153102

Abstract

The nature of electronic states at the Fermi energy in metallic beta-PbO2 has been identified by hard x-ray photoemission spectroscopy (HXPS) combined with x-ray emission spectroscopy and density-functional theory calculations. Pb 6s states are strongly enhanced in HXP spectra, allowing us to locate the Fermi level above the top of the valence band. The occupied conduction-band states have significant Pb 6s character, although the major 6s contribution to the density of states is found 9 eV below the Fermi energy. The enormous potential of HXPS for the study of s states in oxides is emphasized.

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