Phys. Rev. Lett. 36, 1335–1339 (1976)Observation of Two-Dimensional Phases Associated with Defect States on the Surface of TiO2Received 12 April 1976; published in the issue dated 31 May 1976 Surface electronic states associated with defects produced by Ar-ion bombardment of TiO2 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 Ti3+ pairs, and phase III consists of a surface layer of ordered Ti2O3. © 1976 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.36.1335
DOI:
10.1103/PhysRevLett.36.1335
PACS:
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