تقرير
A high-mobility two-dimensional electron gas at the heteroepitaxial spinel/perovskite complex oxide interface of {\gamma}-Al2O3/SrTiO3
| العنوان: | A high-mobility two-dimensional electron gas at the heteroepitaxial spinel/perovskite complex oxide interface of {\gamma}-Al2O3/SrTiO3 |
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| المؤلفون: | Chen, Y. Z., Bovet, N., Trier, F., Christensen, D. V., Qu, F. M., Andersen, N. H., Kasama, T., Zhang, W., Giraud, R., Dufouleur, J., Jespersen, T. S., Sun, J. R., Smith, A., Nygård, J., Lu, L., Büchner, B., Shen, B. G., Linderoth, S., Pryds, N. |
| المصدر: | Nature Communications, Nat Commun. 2013;4:1371 |
| سنة النشر: | 2013 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | The discovery of two-dimensional electron gases (2DEGs) at the heterointerface between two insulating perovskite-type oxides, such as LaAlO3 and SrTiO3, provides opportunities for a new generation of all-oxide electronic and photonic devices. However, significant improvement of the interfacial electron mobility beyond the current value of approximately 1,000 cm2V-1s-1 (at low temperatures), remains a key challenge for fundamental as well as applied research of complex oxides. Here, we present a new type of 2DEG created at the heterointerface between SrTiO3 and a spinel {\gamma}-Al2O3 epitaxial film with excellent quality and compatible oxygen ions sublattices. This spinel/perovskite oxide heterointerface exhibits electron mobilities more than one order of magnitude higher than those of perovskite/perovskite oxide interfaces, and demonstrates unambiguous two-dimensional conduction character as revealed by the observation of quantum magnetoresistance oscillations. Furthermore, we find that the spinel/perovskite 2DEG results from interface-stabilized oxygen vacancies and is confined within a layer of 0.9 nm in proximity to the heterointerface. Our findings pave the way for studies of mesoscopic physics with complex oxides and design of high-mobility all-oxide electronic devices. Comment: 25pages, 5 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1038/ncomms2394 |
| URL الوصول: | http://arxiv.org/abs/1304.0336 |
| رقم الأكسشن: | edsarx.1304.0336 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1038/ncomms2394 |
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