skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: In-situ probing of coupled atomic restructuring and metallicity of oxide heterointerfaces induced by polar adsorbates

Authors:
ORCiD logo [1];  [2];  [3]; ORCiD logo [4]; ORCiD logo [1];  [1];  [1];  [1];  [5];  [4];  [3];  [1]
  1. Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
  2. X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
  3. Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA
  4. Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
  5. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1396065
Grant/Contract Number:
FG02-06ER46327
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 111; Journal Issue: 14; Related Information: CHORUS Timestamp: 2018-02-15 00:56:32; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English

Citation Formats

Ryu, S., Zhou, H., Paudel, T. R., Irwin, J., Podkaminer, J. P., Bark, C. W., Lee, D., Kim, T. H., Fong, D. D., Rzchowski, M. S., Tsymbal, E. Y., and Eom, C. B.. In-situ probing of coupled atomic restructuring and metallicity of oxide heterointerfaces induced by polar adsorbates. United States: N. p., 2017. Web. doi:10.1063/1.4991956.
Ryu, S., Zhou, H., Paudel, T. R., Irwin, J., Podkaminer, J. P., Bark, C. W., Lee, D., Kim, T. H., Fong, D. D., Rzchowski, M. S., Tsymbal, E. Y., & Eom, C. B.. In-situ probing of coupled atomic restructuring and metallicity of oxide heterointerfaces induced by polar adsorbates. United States. doi:10.1063/1.4991956.
Ryu, S., Zhou, H., Paudel, T. R., Irwin, J., Podkaminer, J. P., Bark, C. W., Lee, D., Kim, T. H., Fong, D. D., Rzchowski, M. S., Tsymbal, E. Y., and Eom, C. B.. 2017. "In-situ probing of coupled atomic restructuring and metallicity of oxide heterointerfaces induced by polar adsorbates". United States. doi:10.1063/1.4991956.
@article{osti_1396065,
title = {In-situ probing of coupled atomic restructuring and metallicity of oxide heterointerfaces induced by polar adsorbates},
author = {Ryu, S. and Zhou, H. and Paudel, T. R. and Irwin, J. and Podkaminer, J. P. and Bark, C. W. and Lee, D. and Kim, T. H. and Fong, D. D. and Rzchowski, M. S. and Tsymbal, E. Y. and Eom, C. B.},
abstractNote = {},
doi = {10.1063/1.4991956},
journal = {Applied Physics Letters},
number = 14,
volume = 111,
place = {United States},
year = 2017,
month =
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on October 3, 2018
Publisher's Accepted Manuscript

Citation Metrics:
Cited by: 1work
Citation information provided by
Web of Science

Save / Share:
  • Microscopic understanding of the surface-controlled conductivity of the two dimensional electron gas at complex oxide interfaces is crucial for developing functional interfaces. We observe conductivity and structural modification using in-situ synchrotron surface x-ray diffraction as the surface of a model LaAlO3/SrTiO3 (001) heterostructure is changed by polar adsorbates. We find that polar adsorbate-induced interfacial metallicity reduces polar distortions in the LaAlO3 layer. First-principles density functional theory calculations show that surface dipoles introduced by polar adsorbates lead to additional charge transfer and the reduction of polar displacements in the LaAlO3 layer, consistent with the experimental observations. Our study supports that internalmore » structural deformations controlling functionalities can be driven without the application of direct electrical or thermal bias and offers a route to tuning interfacial properties. These results also highlight the important role of in-situ x-ray scattering with atomic resolution in capturing and exploring structural distortions and charge density changes caused by external perturbations such as chemical adsorption, redox reaction, and generation and/or annihilation of surface defects.« less
  • The interfaces of polar oxide heterostructures can display electronic properties unique from the oxides they border, as they require screening from either internal or external sources of charge. The screening mechanism depends on a variety of factors, including the band structure at the interface, the presence of point defects or adsorbates, whether or not the oxide is ferroelectric, and whether or not an external field is applied. In this review, we discuss both theoretical and experimental aspects of different screening mechanisms, giving special emphasis to ways in which the mechanism can be altered to provide novel or tunable functionalities. Wemore » begin with a theoretical introduction to the problem and highlight recent progress in understanding the impact of point defects on polar interfaces. Different case studies are then discussed, for both the high thickness regime, where interfaces must be screened and each interface can be considered separately, and the low thickness regime, where the degree and nature of screening can be manipulated and the interfaces are close enough to interact. As a result, we end with a brief outlook toward new developments in this rapidly progressing field.« less
  • We study the effect of the surface adsorption of a variety of common laboratory solvents on the conductivity at the interface between LaAlO{sub 3} and SrTiO{sub 3}. This interface possesses a range of intriguing physics, notably a proposed connection between the surface state of the LaAlO{sub 3} and the conductivity buried in the SrTiO{sub 3}. We show that the application of chemicals such as acetone, ethanol, and water can induce a large change (factor of three) in the conductivity. This phenomenon is observed only for polar solvents. These data provide experimental evidence for a general polarization-facilitated electronic transfer mechanism.