Abbate, M., Potze, R., Sawatzky, G.A., Schlenker, C., Lin, H.J., Tjeng, L.H., Chen, C.T., Teehan, D. and Turner, T.S. (1995) Changes in the electronic structure of Ti4O7 across the semiconductor–semiconductor-metal transitions. Physical Review B, 51 (15). pp. 10150-10153. ISSN 1098-0121
Metadata only available from this repository.Abstract
We present and discuss photoemission (PES) and O 1s x-ray-absorption spectra (XAS) of Ti 4 O 7 taken at different temperatures in the range 50–300 K. The PES taken at 300 K show Ti 3d bands at the Fermi level and O 2p bands at higher binding energies. The Ti 3d bands shift approximately 0.25 eV towards higher binding energies in the low-temperature semiconducting phase (50 K). The O 1s XAS are related, via the corresponding metal-oxygen hybridization, to the unoccupied electronic states in the conduction band. The XAS taken at 300 K reflect Ti 3d bands at threshold and Ti 4sp bands at higher photon energies. The Ti 3d bands are split by crystal-field effects into t 2g and e g subbands and shift approximately 0.45 eV towards higher photon energies in the low-temperature semiconducting phase (80 K). The XAS are basically temperature independent in both the low-temperature semiconducting phase and in the high-temperature metallic phase. The main changes in the O 1s XAS appear rather suddenly at the semiconductor-metal transition around 150 K.
Item Type: | Article |
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Subjects: | Q Science > QC Physics |
Schools: | Research and Enterprise Directorate |
Related URLs: | |
Depositing User: | Rosemary Wood |
Date Deposited: | 27 Mar 2014 15:42 |
Last Modified: | 04 Apr 2018 11:30 |
URI: | http://eprints.hud.ac.uk/id/eprint/19601 |
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