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Correlating polar distortions and interfacial charge at the polar/non-polar LaCrO3/SrTiO3(001) interface

Publication ,  Journal Article
Al-Tawhid, AH; Kumah, DP
Published in: AIP Advances
April 1, 2020

The relationship between the sheet carrier concentration, ns, of LaCrO3(LCO)/SrTiO3(STO) heterostructures and their structural properties has been investigated. Under low oxygen partial pressure, the STO substrate is reduced during growth as evidenced by a high ns of 1016 cm-2. By controlling the post-growth annealing conditions, heterostructures with ns of 1013-1016 cm-2 are achieved. The atomic-scale structure of the samples is obtained using high-resolution synchrotron X-ray diffraction measurements. For heterostructures with ns at or below 3 × 1013 cm-2, polar distortions are present within the LCO layers and increase in magnitude with a decrease in sheet carrier concentration. These distortions are absent for samples with ns on the order of 1015-1016 cm-2 where interfacial carriers play a role in alleviating the polar discontinuity at the LCO/STO interface. These results suggest that interfacial charge carriers and polar distortions can act as complementary mechanisms to alleviate the polar discontinuity at polar/non-polar complex oxide interfaces.

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Published In

AIP Advances

DOI

EISSN

2158-3226

Publication Date

April 1, 2020

Volume

10

Issue

4

Related Subject Headings

  • 51 Physical sciences
  • 40 Engineering
  • 0906 Electrical and Electronic Engineering
  • 0206 Quantum Physics
  • 0205 Optical Physics
 

Citation

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Al-Tawhid, A. H., & Kumah, D. P. (2020). Correlating polar distortions and interfacial charge at the polar/non-polar LaCrO3/SrTiO3(001) interface. AIP Advances, 10(4). https://doi.org/10.1063/5.0002298
Al-Tawhid, A. H., and D. P. Kumah. “Correlating polar distortions and interfacial charge at the polar/non-polar LaCrO3/SrTiO3(001) interface.” AIP Advances 10, no. 4 (April 1, 2020). https://doi.org/10.1063/5.0002298.
Al-Tawhid, A. H., and D. P. Kumah. “Correlating polar distortions and interfacial charge at the polar/non-polar LaCrO3/SrTiO3(001) interface.” AIP Advances, vol. 10, no. 4, Apr. 2020. Scopus, doi:10.1063/5.0002298.

Published In

AIP Advances

DOI

EISSN

2158-3226

Publication Date

April 1, 2020

Volume

10

Issue

4

Related Subject Headings

  • 51 Physical sciences
  • 40 Engineering
  • 0906 Electrical and Electronic Engineering
  • 0206 Quantum Physics
  • 0205 Optical Physics