Abstract
| Original language | English |
|---|---|
| Article number | 113718 |
| Journal | Journal of Applied Physics |
| Volume | 112 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Dec 2012 |
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Electronic structure of CuCrO2 thin films grown on Al2O3(001) by oxygen plasma assisted molecular beam epitaxy. / Shin, D.; Foord, J.S.; Egdell, R.G.; Walsh, A.
In: Journal of Applied Physics, Vol. 112, No. 11, 113718, 12.2012.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Electronic structure of CuCrO2 thin films grown on Al2O3(001) by oxygen plasma assisted molecular beam epitaxy
AU - Shin, D.
AU - Foord, J.S.
AU - Egdell, R.G.
AU - Walsh, A.
PY - 2012/12
Y1 - 2012/12
N2 - Thin films of CuCrO have been grown on AlO (001) substrates by oxygen plasma assisted molecular beam epitaxy. With a substrate temperature of 700°C or 750°C, the films showed an unanticipated (015) orientation but at a higher substrate temperature of 800°C the expected basal (001) orientation predominates. The optical absorption spectrum of CuCrO shows a direct allowed absorption onset at 3.18eV together with a weak peak at 2.0eV which is suppressed by Sn doping. This suggests that the low energy peak should be attributed to 3d→3d excitations associated with Cu defect states rather than excitations localised on Cr. Valence band X-ray photoemission spectra of (001) and (015) oriented CuCrO are compared with those obtained from polycrystalline samples.
AB - Thin films of CuCrO have been grown on AlO (001) substrates by oxygen plasma assisted molecular beam epitaxy. With a substrate temperature of 700°C or 750°C, the films showed an unanticipated (015) orientation but at a higher substrate temperature of 800°C the expected basal (001) orientation predominates. The optical absorption spectrum of CuCrO shows a direct allowed absorption onset at 3.18eV together with a weak peak at 2.0eV which is suppressed by Sn doping. This suggests that the low energy peak should be attributed to 3d→3d excitations associated with Cu defect states rather than excitations localised on Cr. Valence band X-ray photoemission spectra of (001) and (015) oriented CuCrO are compared with those obtained from polycrystalline samples.
UR - http://www.scopus.com/inward/record.url?scp=84871218519&partnerID=8YFLogxK
UR - http://dx.doi.org/10.1063/1.4768726
U2 - 10.1063/1.4768726
DO - 10.1063/1.4768726
M3 - Article
VL - 112
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 11
M1 - 113718
ER -