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  Extreme mobility enhancement of two-dimensional electron gases at oxide interfaces by charge-transfer-induced modulation doping

Chen, Y. Z., Trier, F., Wijnands, T., Green, R. J., Gauquelin, N., Egoavil, R., et al. (2015). Extreme mobility enhancement of two-dimensional electron gases at oxide interfaces by charge-transfer-induced modulation doping. Nature Materials, 14(8), 801-806. doi:10.1038/NMAT4303.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-509C-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-1747-6
Genre: Journal Article

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 Creators:
Chen, Y. Z.1, Author
Trier, F.1, Author
Wijnands, T.1, Author
Green, R. J.2, Author              
Gauquelin, N.1, Author
Egoavil, R.1, Author
Christensen, D. V.1, Author
Koster, G.1, Author
Huijben, M.1, Author
Bovet, N.1, Author
Macke, S.1, Author
He, F.1, Author
Sutarto, R.1, Author
Andersen, N. H.1, Author
Sulpizio, J. A.1, Author
Honig, M.1, Author
Prawiroatmodjo, G. E. D. K.1, Author
Jespersen, T. S.1, Author
Linderoth, S.1, Author
Ilani, S.1, Author
Verbeeck, J.1, AuthorVan Tendeloo, G.1, AuthorRijnders, G.1, AuthorSawatzky, G. A.1, AuthorPryds, N.1, Author more..
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: Two-dimensional electron gases (2DEGs) formed at the interface of insulating complex oxides promise the development of all-oxide electronic devices. These 2DEGs involve many-body interactions that give rise to a variety of physical phenomena such as superconductivity, magnetism, tunable metal-insulator transitions and phase separation. Increasing the mobility of the 2DEG, however, remains a major challenge. Here, we show that the electron mobility is enhanced by more than two orders of magnitude by inserting a single-unit-cell insulating layer of polar La1-xSrxMnO3 (x = 0, 1/8, and 1/3) at the interface between disordered LaAlO3 and crystalline SrTiO3 produced at room temperature. Resonant X-ray spectroscopy and transmission electron microscopy show that the manganite layer undergoes unambiguous electronic reconstruction, leading to modulation doping of such atomically engineered complex oxide heterointerfaces. At low temperatures, the modulation-doped 2DEG exhibits Shubnikov-de Haas oscillations and fingerprints of the quantum Hall effect, demonstrating unprecedented high mobility and low electron density.

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Language(s): eng - English
 Dates: 2015-06-012015-08-20
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000358530100022
DOI: 10.1038/NMAT4303
 Degree: -

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Title: Nature Materials
  Abbreviation : Nat. Mater.
Source Genre: Journal
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Publ. Info: London, UK : Nature Pub. Group
Pages: - Volume / Issue: 14 (8) Sequence Number: - Start / End Page: 801 - 806 Identifier: ISSN: 1476-1122
CoNE: /journals/resource/111054835734000