Abstract
Surface electronic states associated with defects produced by Ar-ion bombardment of Ti${\mathrm{O}}_{2}$ crystals have been studied by ultraviolet-photoemission, electron-energy-loss, and Auger spectroscopy and low-energy-electron diffraction. Evidence is given for three distinct phases dependent upon the extrinsic surface-defect concentration. Phase I contains isolated surface states 0.7 eV below the conduction band, phase II is associated with the creation of ${\mathrm{Ti}}^{3+}$ pairs, and phase III consists of a surface layer of ordered ${\mathrm{Ti}}_{2}$${\mathrm{O}}_{3}$.
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Publication Info
- Year
- 1976
- Type
- article
- Volume
- 36
- Issue
- 22
- Pages
- 1335-1339
- Citations
- 500
- Access
- Closed
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Identifiers
- DOI
- 10.1103/physrevlett.36.1335