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Surface Structure and Electronic Property of Reduced SrTiO3 (100) Surface Observed by STM/STS

Published online by Cambridge University Press:  15 February 2011

Takuya Matsumoto ,
Hiroyuki Tanaka ,
Tomoji Kawai  and
Shichio Kawai
Takuya Matsumoto
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Mihogaoka, Ibaraki, Osaka 567, Japan.
Hiroyuki Tanaka
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Mihogaoka, Ibaraki, Osaka 567, Japan.
Tomoji Kawai
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Mihogaoka, Ibaraki, Osaka 567, Japan.
Shichio Kawai
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Mihogaoka, Ibaraki, Osaka 567, Japan.
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Abstract

We have obtained STM images and STS data with atomic-scale resolution for SrTIO3 (100) surface annealed in UHV at 1200 °C. A √5×√5-R26.6° surface superstructure indicating oxygen vacancy ordering has been observed. The STS data provide evidence for a localized surface state arising from oxygen vacancies at 1.35 eV below the Fermi level. STM images of the √5×√5 structure correspond to the surface orbital of the ordered Ti-oxygen vacancy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 295: Symposium W – Atomic-Scale Imaging of Surfaces and Interfaces , 1992 , 35
Copyright
Copyright © Materials Research Society 1993

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