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High mobility 2-dimensional electron gas at LaAlO3/SrTiO3 interface prepared by spin coating chemical methods.
- Source :
-
Nanotechnology . 10/27/2017, Vol. 28 Issue 43, p1-1. 1p. - Publication Year :
- 2017
-
Abstract
- Highly mobile 2-dimensional electron gases (2DEGs) at the (001), (011) and (111)-oriented LaAlO3/SrTiO3 (LAO/STO) interfaces are obtained using spin coating chemical method, which is a gentle technique without plasma bombardment of the pulsed laser deposition. As revealed by x-ray diffraction spectrum and x-ray reflectivity analysis, the LAO over layer is epitaxially grown, and has a uniform thickness of ∼15 nm, ∼20 nm and ∼26 nm for (001), (011) and (111) orientations, respectively. The interfaces are well metallic down to 2 K. The carrier mobilities are ∼28 000 cm2 V−1 s−1, ∼22 000 cm2 V−1 s−1 and ∼8300 cm2 V−1 s−1 at 2 K for the (001), (011) and (111) LAO/STO interfaces, respectively, and ∼8 cm2 V−1 s−1, ∼4 cm2 V−1 s−1 and ∼4 cm2 V−1 s−1 at room temperature. The present work shows that the spin coating chemical method is a feasible approach to get high quality 2DEG at both the polar/non-polar and polar/polar interfaces. [ABSTRACT FROM AUTHOR]
- Subjects :
- *TWO-dimensional electron gas
*SPIN coating
*TITANIUM oxides
Subjects
Details
- Language :
- English
- ISSN :
- 09574484
- Volume :
- 28
- Issue :
- 43
- Database :
- Academic Search Index
- Journal :
- Nanotechnology
- Publication Type :
- Academic Journal
- Accession number :
- 125483325
- Full Text :
- https://doi.org/10.1088/1361-6528/aa8842