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  Growth and electrostatic/chemical properties of Metal/LaAlO3/SrTiO3 heterostructures

Vaz, D. C., Lesne, E., Sander, A., Naganuma, H., Jacquet, E., Santamaria, J., et al. (2018). Growth and electrostatic/chemical properties of Metal/LaAlO3/SrTiO3 heterostructures. Journal of Visualized Experiments, 132: e56951. doi:10.3791/56951.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0009-2730-5 Version Permalink: https://hdl.handle.net/21.11116/0000-000F-CBCD-6
Genre: Journal Article

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2018
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Journal of Visualized Experiments
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https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5912391/ (Publisher version)
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 Creators:
Vaz, Diogo Cast1, Author
Lesne, Eouard2, Author
Sander, Anke1, Author
Naganuma, Hiroshi1, Author
Jacquet, Eric1, Author
Santamaria, Jacobo1, Author
Barthelemy, Agnes1, Author
Bibes, Manuel1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society, Weinberg 2, 06120 Halle, DE, ou_3287476              

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 Abstract: The quasi 2D electron system (q2DES) that forms at the interface between LaAlO3 (LAO) and SrTiO3 (STO) has attracted much attention from the oxide electronics community. One of its hallmark features is the existence of a critical LAO thickness of 4 unit-cells (uc) for interfacial conductivity to emerge. Although electrostatic mechanisms have been proposed in the past to describe the existence of this critical thickness, the importance of chemical defects has been recently accentuated. Here, we describe the growth of metal/LAO/STO heterostructures in an ultra-high vacuum (UHV) cluster system combining pulsed laser deposition (to grow the LAO), magnetron sputtering (to grow the metal) and X-ray photoelectron spectroscopy (XPS). We study step by step the formation and evolution of the q2DES and the chemical interactions that occur between the metal and the LAO/STO. Additionally, magnetotransport experiments elucidate on the transport and electronic properties of the q2DES. This systematic work not only demonstrates a way to study the electrostatic and chemical interplay between the q2DES and its environment, but also unlocks the possibility to couple multifunctional capping layers with the rich physics observed in two-dimensional electron systems, allowing the fabrication of new types of devices.

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 Dates: 2018-02-08
 Publication Status: Published online
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 Rev. Type: -
 Identifiers: BibTex Citekey: P13710
DOI: 10.3791/56951
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Title: Journal of Visualized Experiments
  Other : Journal of Visualized Experiments: JoVE
  Abbreviation : J. Vis. Exp.
Source Genre: Journal
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Publ. Info: Rockville Pike, Bethesda MD : JoVE
Pages: - Volume / Issue: 132 Sequence Number: e56951 Start / End Page: - Identifier: ISSN: 1940-087X
CoNE: https://pure.mpg.de/cone/journals/resource/1940087X