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Title: Nano-engineering of electron correlation in oxide superlattices

Abstract

Oxide heterostructures and superlattices (SLs) have attracted a great deal of attention in recent years owing to the rich exotic properties encountered at their interfaces. We focus on the potential of tunable correlated oxides by investigating the spectral function of the prototypical correlated metal SrVO3 , using soft x-ray absorption spectroscopy and resonant inelastic soft x-ray scattering to access both unoccupied and occupied electronic states, respectively. We demonstrate a remarkable level of tunability in the spectral function of SrVO 3 by varying its thickness within the SrVO 3/SrTiO 3 SL, showing that the effects of electron correlation can be tuned from dominating the energy spectrum in a strongly correlated Mott–Hubbard insulator, towards a correlated metal. We show that the effects of dimensionality on the correlated properties of SrVO 3 are augmented by interlayer coupling, yielding a highly flexible correlated oxide that may be readily married with other oxide systems.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [2];  [2];  [4];  [4];  [5]
  1. Boston Univ., MA (United States); Univ. of Bristol, Tyndall Avenue, Bristol (United Kingdom)
  2. Univ. of Virginia, Charlottesville, VA (United States)
  3. Univ. of of Auckland, Auckland (New Zealand)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  5. Boston Univ., MA (United States); Univ. of of Auckland, Auckland (New Zealand)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division; Army Research Office (ARO)
OSTI Identifier:
1601164
Grant/Contract Number:  
[AC02-05CH11231; FG02-98ER45680; W911-NF-09-1-0398]
Resource Type:
Accepted Manuscript
Journal Name:
Nano Futures
Additional Journal Information:
[ Journal Volume: 1; Journal Issue: 3]; Journal ID: ISSN 2399-1984
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Laverock, J., Gu, M., Jovic, V., Lu, J. W., Wolf, S. A., Qiao, R. M., Yang, W., and Smith, K. E. Nano-engineering of electron correlation in oxide superlattices. United States: N. p., 2017. Web. doi:10.1088/2399-1984/aa8f39.
Laverock, J., Gu, M., Jovic, V., Lu, J. W., Wolf, S. A., Qiao, R. M., Yang, W., & Smith, K. E. Nano-engineering of electron correlation in oxide superlattices. United States. doi:10.1088/2399-1984/aa8f39.
Laverock, J., Gu, M., Jovic, V., Lu, J. W., Wolf, S. A., Qiao, R. M., Yang, W., and Smith, K. E. Mon . "Nano-engineering of electron correlation in oxide superlattices". United States. doi:10.1088/2399-1984/aa8f39. https://www.osti.gov/servlets/purl/1601164.
@article{osti_1601164,
title = {Nano-engineering of electron correlation in oxide superlattices},
author = {Laverock, J. and Gu, M. and Jovic, V. and Lu, J. W. and Wolf, S. A. and Qiao, R. M. and Yang, W. and Smith, K. E.},
abstractNote = {Oxide heterostructures and superlattices (SLs) have attracted a great deal of attention in recent years owing to the rich exotic properties encountered at their interfaces. We focus on the potential of tunable correlated oxides by investigating the spectral function of the prototypical correlated metal SrVO3 , using soft x-ray absorption spectroscopy and resonant inelastic soft x-ray scattering to access both unoccupied and occupied electronic states, respectively. We demonstrate a remarkable level of tunability in the spectral function of SrVO3 by varying its thickness within the SrVO3/SrTiO3 SL, showing that the effects of electron correlation can be tuned from dominating the energy spectrum in a strongly correlated Mott–Hubbard insulator, towards a correlated metal. We show that the effects of dimensionality on the correlated properties of SrVO3 are augmented by interlayer coupling, yielding a highly flexible correlated oxide that may be readily married with other oxide systems.},
doi = {10.1088/2399-1984/aa8f39},
journal = {Nano Futures},
number = [3],
volume = [1],
place = {United States},
year = {2017},
month = {10}
}

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