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Growth-temperature dependence of conductivity at the LaCrO 3 /SrTiO 3 (001) interface

Publication ,  Journal Article
Al-Tawhid, A; Frick, JR; Dougherty, DB; Kumah, DP
Published in: Journal of Vacuum Science and Technology A Vacuum Surfaces and Films
March 1, 2019
Published version (DOI)

The effect of growth conditions and postgrowth treatment on the structural and electronic properties of the polar/nonpolar LaCrO3/SrTiO3 (LCO/STO) interface has been investigated. Under low oxygen partial pressure, oxygen vacancies are formed in the STO substrate resulting in metallicity with a measured sheet carrier concentration of 1016cm - 2. Annealing postgrowth in flowing oxygen causes the sheet carrier concentration to saturate to 1013cm - 2, which is consistent with the reported values of a two-dimensional gas at other polar/STO interfaces. However, growth under nonreducing growth conditions leads to insulating behavior. High-resolution synchrotron x-ray-based structural determination of the atomic-scale structures of both metallic and insulating LCO/STO interfaces shows chemical intermixing and an interfacial lattice expansion.

Duke Scholars

Divine P Kumah
Author Divine P Kumah Physics

Published In

Journal of Vacuum Science and Technology A Vacuum Surfaces and Films

DOI

10.1116/1.5085334

EISSN

1520-8559

ISSN

0734-2101

Publication Date

March 1, 2019

Volume

37

Issue

2

Related Subject Headings

  • Applied Physics
  • 51 Physical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
 

Citation

APA
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ICMJE
MLA
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Al-Tawhid, A., Frick, J. R., Dougherty, D. B., & Kumah, D. P. (2019). Growth-temperature dependence of conductivity at the LaCrO 3 /SrTiO 3 (001) interface. Journal of Vacuum Science and Technology A Vacuum Surfaces and Films, 37(2). https://doi.org/10.1116/1.5085334
Al-Tawhid, A., J. R. Frick, D. B. Dougherty, and D. P. Kumah. “Growth-temperature dependence of conductivity at the LaCrO 3 /SrTiO 3 (001) interface.” Journal of Vacuum Science and Technology A Vacuum Surfaces and Films 37, no. 2 (March 1, 2019). https://doi.org/10.1116/1.5085334.
Al-Tawhid A, Frick JR, Dougherty DB, Kumah DP. Growth-temperature dependence of conductivity at the LaCrO 3 /SrTiO 3 (001) interface. Journal of Vacuum Science and Technology A Vacuum Surfaces and Films. 2019 Mar 1;37(2).
Al-Tawhid, A., et al. “Growth-temperature dependence of conductivity at the LaCrO 3 /SrTiO 3 (001) interface.” Journal of Vacuum Science and Technology A Vacuum Surfaces and Films, vol. 37, no. 2, Mar. 2019. Scopus, doi:10.1116/1.5085334.
Al-Tawhid A, Frick JR, Dougherty DB, Kumah DP. Growth-temperature dependence of conductivity at the LaCrO 3 /SrTiO 3 (001) interface. Journal of Vacuum Science and Technology A Vacuum Surfaces and Films. 2019 Mar 1;37(2).

Published In

Journal of Vacuum Science and Technology A Vacuum Surfaces and Films

DOI

10.1116/1.5085334

EISSN

1520-8559

ISSN

0734-2101

Publication Date

March 1, 2019

Volume

37

Issue

2

Related Subject Headings

  • Applied Physics
  • 51 Physical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences