High mobility 2-dimensional electron gas at LaAlO3/SrTiO3 interface prepared by spin coating chemical methods. (26th September 2017)

• Record Type: Journal Article
• Authors: Khan, Tahira; Zhang, Hui; Zhang, Hongrui; Yan, Xi; Hong, Deshun; Han, Furong; Chen, Yuansha; Shen, Baogen; Sun, Jirong
• Is Part Of: Nanotechnology. Volume 28:Number 43(2017)
• Publication Date: 2017-09-26
• Subjects: 2DEG -- LaAlO3/SrTiO3 -- chemical methods; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/aa8842
• Languages: English
• ISSNs: 0957-4484

Abstract

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 cm 2 V −1 s −1, ∼22 000 cm 2 V −1 s −1 and ∼8300 cm 2 V −1 s −1 at 2 K for the (001), (011) and (111) LAO/STO interfaces, respectively, and ∼8 cm 2 V −1 s −1, ∼4 cm 2 V −1 s −1 and ∼4 cm 2 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.