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 |
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Article number | 031913 |
Journal | Applied Physics Letters |
Volume | 103 |
Issue number | 3 |
DOIs | |
Publication status | Published - Jul 15 2013 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)