Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 13, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3371690
Keywords
electronic structure; lanthanum compounds; rough surfaces; superlattices; surface morphology; valency
Categories
Funding
- DOD-ARO [040217291]
- NSF [DMR-0747808]
- U.S. Department of Energy, Office of Science [DEAC02-06CH11357]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [747808] Funding Source: National Science Foundation
Ask authors/readers for more resources
We have conducted a detailed microscopic investigation of [LaNiO3(1 u.c.)/LaAlO3(1 u.c.)](N) superlattices grown on (001) SrTiO3 and LaAlO3 to explore the influence of polar mismatch on the resulting electronic and structural properties. Our data demonstrate that the initial growth on the nonpolar SrTiO3 surface leads to a rough morphology and unusual 2+ valence of Ni in the initial LaNiO3 layer, which is not observed after growth on the polar surface of LaAlO3. A devised model suggests that the polar mismatch can be resolved if the perovskite layers grow with an excess of LaO, which also accounts for the observed electronic, chemical, and structural effects.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
