Variation of the local electronic structure at rutile TiO2(110) surfaces was studied by scanning tunneling spectroscopy (STS). Structural surface features like step edges, (1 x 2) reconstructed strands, and their terminations were correlated to changes in tunneling spectra. In particular, band gap states, associated with a reduced surface, showed characteristic variations. In addition, electronic variations due extrinsic defects are discussed. Nanometer wide protrusions in constant current scanning tunneling microscopy images were identified in STS as local electronic alterations. These features are interpreted to be due to local band bending induced by individual, charged impurity atoms.
Revised: November 20, 2003 |
Published: December 15, 2002
Citation
Batzill M., B. Katsiev, D.J. Gaspar, and U. Diebold. 2002.Variations of the Local Electronic Surface Properties of TiO2(110) Induced By Intrinsic and Extrinsic Defects.Physical Review. B, Condensed Matter and Materials Physics 6623, no. 23:621-630.PNNL-SA-36718.