Structural anisotropy in amorphous SnO2 film probed by X-ray absorption spectroscopy

Q. Zhu, Q. Ma, D. B. Buchholz, R. P.H. Chang, M. J. Bedzyk, T. O. Mason

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Polarization-dependent X-ray absorption measurements reveal the existence of structural anisotropy in amorphous (a-) SnO2 film. The anisotropy is readily seen for the second neighbor interaction whose magnitude differs along three measured directions. The differences can be well accounted for by 10%-20% variation in the Debye-Waller factor. Instead of a single Gaussian distribution found in crystalline SnO2, the Sn-O bond distribution is bimodal in a-SnO2 whose separation shows a weak angular dependence. The oxygen vacancies, existing in the a-SnO2 film in the order of 1021 cm-3, distribute preferentially along the film surface direction.

Original languageEnglish
Article number031913
JournalApplied Physics Letters
Volume103
Issue number3
DOIs
Publication statusPublished - Jul 15 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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