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 | |
| Publication status | Published - Jul 15 2013 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
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Structural anisotropy in amorphous SnO2 film probed by X-ray absorption spectroscopy. / Zhu, Q.; Ma, Q.; Buchholz, D. B.; Chang, Robert P. H.; Bedzyk, M. J.; Mason, Thomas O.
In: Applied Physics Letters, Vol. 103, No. 3, 031913, 15.07.2013.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Structural anisotropy in amorphous SnO2 film probed by X-ray absorption spectroscopy
AU - Zhu, Q.
AU - Ma, Q.
AU - Buchholz, D. B.
AU - Chang, Robert P. H.
AU - Bedzyk, M. J.
AU - Mason, Thomas O
PY - 2013/7/15
Y1 - 2013/7/15
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84881501184&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84881501184&partnerID=8YFLogxK
U2 - 10.1063/1.4815984
DO - 10.1063/1.4815984
M3 - Article
AN - SCOPUS:84881501184
VL - 103
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 3
M1 - 031913
ER -