NDLI: Optical Study of Tetragonal Domains in LaAlO$_{3}$/SrTiO$

Content Provider	Springer Nature Link
Author	Erlich, Z. Frenkel, Y. Drori, J. Shperber, Y. Bell, C. Sato, H. K. Hosoda, M. Xie, Y. Hikita, Y. Hwang, H. Y. Kalisky, B.
Copyright Year	2014
Abstract	Scanning superconducting quantum interference device (SQUID) measurements recently revealed enhanced channels of conductivity at the conducting LaAlO$_{3}$/SrTiO$_{3}$ (LAO/STO) interface (Kalisky et al. Nat. Mater. 12, 1091 2013). The orientation of the channels and their thermal behavior suggest that they originate as a consequence of the STO tetragonal domain formation which sets in below ∼105 K. In this work, we use polarized light microscopy to acquire images of the tetragonal domains in the same group of LAO/STO samples. We looked at the configuration of the domains (orientation and spacing) and followed their behavior as a function of temperature and back-gate voltage. The optical data agrees with the electrical behavior mapped magnetically. This direct and independent study of the domain structure confirms that the channel-like conductivity in LAO/STO is due to the STO tetragonal domain structure and emphasizes the importance of STO physics to the interfacial properties. These results demonstrate how small structural changes in perovskite crystals strongly influence the electronic characteristics of heterostructures.
Starting Page	1017
Ending Page	1020
Page Count	4
File Format	PDF
ISSN	15571939
Journal	Journal of Superconductivity and Novel Magnetism
Volume Number	28
Issue Number	3
e-ISSN	15571947
Language	English
Publisher	Springer US
Publisher Date	2014-08-30
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	LaAlO3/SrTiO3 Polarized light microscopy Tetragonal domains Strongly Correlated Systems, Superconductivity Magnetism, Magnetic Materials Condensed Matter Physics Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics

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