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

doi:10.1063/1.4815984

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

Northwestern University

Research output: Contribution to journal › Article

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 language	English
Article number	031913
Journal	Applied Physics Letters
Volume	103
Issue number	3
DOIs	https://doi.org/10.1063/1.4815984
Publication status	Published - Jul 15 2013

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4815984

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Zhu, Q., Ma, Q., Buchholz, D. B., Chang, R. P. H., Bedzyk, M. J., & Mason, T. O. (2013). Structural anisotropy in amorphous SnO₂ film probed by X-ray absorption spectroscopy. Applied Physics Letters, 103(3), [031913]. https://doi.org/10.1063/1.4815984

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