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  Tuning the Two-Dimensional Electron Liquid at Oxide Interfaces by Buffer-Layer-Engineered Redox Reactions

Chen, Y., Green, R. J., Sutarto, R., He, F., Linderoth, S., Sawatzky, G. A., et al. (2017). Tuning the Two-Dimensional Electron Liquid at Oxide Interfaces by Buffer-Layer-Engineered Redox Reactions. Nano Letters, 17(11), 7062-7066. doi:10.1021/acs.nanolett.7b03744.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-9E73-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-9E76-1
Genre: Journal Article

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 Creators:
Chen, Yunzhong1, Author
Green, Robert J.2, Author              
Sutarto, Ronny1, Author
He, Feizhou1, Author
Linderoth, Soren1, Author
Sawatzky, George A.1, Author
Pryds, Nini1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              

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 Abstract: Polar discontinuities and redox reactions provide alternative paths to create two-dimensional electron liquids (2DELs) at oxide interfaces. Herein, we report high mobility 2DELs at interfaces involving SrTiO3 (STO) achieved using polar La7/8Sr1/8MnO3 (LSMO) buffer layers to manipulate both polarities and redox reactions from disordered overlayers grown at room temperature. Using resonant X-ray reflectometry experiments, we quantify redox reactions from oxide overlayers on STO as well as polarity induced electronic reconstruction at epitaxial LSMO/STO interfaces. The analysis reveals how these effects can be combined in a STO/LSMO/disordered film trilayer system to yield high mobility modulation doped 2DELs, where the buffer layer undergoes a partial transformation from perovskite to brownmillerite structure. This uncovered interplay between polar discontinuities and redox reactions via buffer layers provides a new approach for the design of functional oxide interfaces.

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Language(s): eng - English
 Dates: 2017-10-202017-10-20
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1021/acs.nanolett.7b03744
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Title: Nano Letters
  Abbreviation : Nano Lett.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 17 (11) Sequence Number: - Start / End Page: 7062 - 7066 Identifier: ISSN: 1530-6984
CoNE: /journals/resource/110978984570403