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Title: Spin-polarized wide electron slabs in functionally graded polar oxide heterostructures
Authors: Ye, Jiandong
Lim, Sze Ter
Bosman, Michel
Gu, Shulin
Zheng, Youdou
Tan, Hark Hoe
Jagadish, Chennupati
Sun, Xiaowei
Teo, Kie Leong
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2012
Source: Ye, J., Lim, S. T., Bosman, M., Gu, S., Zheng, Y., Tan, H. H., et al. (2012). Spin-polarized Wide Electron Slabs in Functionally Graded Polar Oxide Heterostructures. Scientific Reports, 2, 533.
Series/Report no.: Scientific reports
Abstract: We report on the high mobility wide electron slabs with enhanced correlation effects by tailoring the polarization effects in a functionally graded ZnMgO/ZnO heterostructures. The characteristics of three-dimensional (3D) spreading electrons are evidenced by the capacitance-voltage profiling and the quantization of 3D Fermi surface in magneto-transport measurements. Despite the weak spin-orbit interaction, such electron slabs are spin-polarized with a large zero-field spin splitting energy, which is induced by the carrier-mediated ferromagnetism. Our results suggest that the vast majority of electrons are localized at the surface magnetic moment which does not allow spin manipulations, and only in the region visited by the itinerant carriers that the ferromagnetic exchange interactions via coupling to the surface local moments contribute to the spin transport. The host ferromagnetism is likely due to the formation of Zn cation vacancies on the surface regime induced by the stabilization mechanism and strain-relaxation in ZnMgO polar ionic surface.
DOI: 10.1038/srep00533
Rights: © 2012 The Author(s). This paper was published in Scientific Reports and is made available as an electronic reprint (preprint) with permission of The Author(s). The paper can be found at the following official DOI: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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