Journal
NATURE MATERIALS
Volume 12, Issue 12, Pages 1091-1095Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NMAT3753
Keywords
-
Categories
Funding
- Department of Energy, Office of Basic Energy Sciences, Materials Sciences and Engineering Division [DE-AC02-76SF00515]
- FENA
- EC [FP7-PEOPLE-2012-CIG-333799]
- US Air Force Office of Scientific Research [FAQSSO-10-1-0524]
- German Science Foundation [TRR80]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0957616] Funding Source: National Science Foundation
Ask authors/readers for more resources
The ability to control materials properties through interface engineering is demonstrated by the appearance of conductivity at the interface of certain insulators, most famously the {001} interface of the band insulators LaAlO3 and TiO2-terminated SrTiO3 (STO; refs 1,2). Transport and other measurements in this system show a plethora of diverse physical phenomena(3-14). To better understand the interface conductivity, we used scanning superconducting quantum interference device microscopy to image the magnetic field locally generated by current in an interface. At low temperature, we found that the current flowed in conductive narrow paths oriented along the crystallographic axes, embedded in a less conductive background. The configuration of these paths changed on thermal cycling above the STO cubic-to-tetragonal structural transition temperature, implying that the local conductivity is strongly modified by the STO tetragonal domain structure. The interplay between substrate domains and the interface provides an additional mechanism for understanding and controlling the behaviour of heterostructures.
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