Effect of growth induced (non)stoichiometry on interfacial conductance in LaAlO3/SrTiO3

E. Breckenfeld, N. Bronn, J. Karthik, A. R. Damodaran, S. Lee, N. Mason, L. W. Martin

Research output: Contribution to journalArticle

Abstract

We demonstrate a link between the growth process, the stoichiometry of LaAlO3, and the interfacial electrical properties of LaAlO 3/SrTiO3 heterointerfaces. Varying the relative La:Al cation stoichiometry by a few atomic percent in films grown at 1×10 -3 Torr results in a 2 and 7 order-of-magnitude change in the 300 and 2 K sheet resistance, respectively, with highly conducting states occurring only in La-deficient or Al-excess films. Further reducing the growth pressure results in an increase of the carrier density and a dramatic change in mobility. We discuss the relative contributions of intrinsic and extrinsic effects in controlling the physical properties of this widely studied system.

Original languageEnglish (US)
Article number196804
JournalPhysical review letters
Volume110
Issue number19
DOIs
StatePublished - May 9 2013

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stoichiometry
physical properties
electrical properties
cations
conduction

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Breckenfeld, E., Bronn, N., Karthik, J., Damodaran, A. R., Lee, S., Mason, N., & Martin, L. W. (2013). Effect of growth induced (non)stoichiometry on interfacial conductance in LaAlO3/SrTiO3. Physical review letters, 110(19), [196804]. https://doi.org/10.1103/PhysRevLett.110.196804

Effect of growth induced (non)stoichiometry on interfacial conductance in LaAlO3/SrTiO3. / Breckenfeld, E.; Bronn, N.; Karthik, J.; Damodaran, A. R.; Lee, S.; Mason, N.; Martin, L. W.

In: Physical review letters, Vol. 110, No. 19, 196804, 09.05.2013.

Research output: Contribution to journalArticle

Breckenfeld, E, Bronn, N, Karthik, J, Damodaran, AR, Lee, S, Mason, N & Martin, LW 2013, 'Effect of growth induced (non)stoichiometry on interfacial conductance in LaAlO3/SrTiO3', Physical review letters, vol. 110, no. 19, 196804. https://doi.org/10.1103/PhysRevLett.110.196804
Breckenfeld, E. ; Bronn, N. ; Karthik, J. ; Damodaran, A. R. ; Lee, S. ; Mason, N. ; Martin, L. W. / Effect of growth induced (non)stoichiometry on interfacial conductance in LaAlO3/SrTiO3. In: Physical review letters. 2013 ; Vol. 110, No. 19.
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