4.8 Article

Atomic Layer Engineering of Perovskite Oxides for Chemically Sharp Heterointerfaces

Journal

ADVANCED MATERIALS
Volume 24, Issue 48, Pages 6423-6428

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201202691

Keywords

perovskite oxide interface; pulsed laser deposition; LaAlO3; SrTiO3; atomic layer engineering; epitaxial strain

Funding

  1. U.S. Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division
  2. Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy
  3. U.S. Department of Energy, Basic Energy Sciences [DE-AC02-06CH11357]

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Atomic layer engineering enables fabrication of a chemically sharp oxide heterointerface. The interface formation and strain evolution during the initial growth of LaAlO3/SrTiO3 heterostructures by pulsed laser deposition are investigated in search of a means for controlling the atomic-sharpness of the interface. This study shows that inserting a monolayer of LaAlO3 grown at high oxygen pressure dramatically enhances interface abruptness.

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