SCANNING TUNNELING SPECTROSCOPY STUDY OF TiO2(110) SURFACE

The electronic states of a (110) surface of a single crystal TiO2 sample were studied in real space with atomic resolution by scanning tunneling spectroscopy. Authors found that the inversion of the dominant tunneling current site occurs in the positive sample voltage region above 1.9 V. According t...

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Published inJpn.J.Appl.Phys ,Part 1. Vol. 39, no. 6B, pp. 3789-3792. 2000 Vol. 39; no. 6B; pp. 3789 - 3792
Main Authors Sakai, Y, Ehara, S
Format Journal Article
LanguageEnglish
Published 2000
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Summary:The electronic states of a (110) surface of a single crystal TiO2 sample were studied in real space with atomic resolution by scanning tunneling spectroscopy. Authors found that the inversion of the dominant tunneling current site occurs in the positive sample voltage region above 1.9 V. According to the discrete-variational (DV)-Xa calculations of the surface electronic states, atomic alignments observed in the STM image at a higher tunneling bias voltage are of six-fold coordinated Ti ion rows while those at a lower voltage are of five-fold coordinated Ti rows. A broad peak was observed in the empty state region of a differential conductance spectrum, which is considered to originate from the intrinsic surface states of TiO2(110). 8 refs.
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ISSN:0021-4922
DOI:10.1143/JJAP.39.3789