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Title: Strain-dependent insulating state and Kondo effect in epitaxial SrIrO3 films
The large spin-orbit coupling in iridium oxides plays a significant role in driving novel physical behaviors, including emergent phenomena in the films and heterostructures of perovskite and Ruddlesden-Popper iridates. In this Letter, we study the role of epitaxial strain on the electronic behavior of thin SrIrO3 films. We find that compressive epitaxial strain leads to metallic transport behavior, but a slight tensile strain shows gapped behavior. Temperature-dependent resistivity measurements are used to examine different behaviors in films as a function of strain. We find Kondo contributions to the resistivity, with stronger effects in films that are thinner and under less compressive epitaxial strain. These results show the potential to tune SrIrO3 into Kondo insulating states and open possibilities for a quantum critical point that can be controlled with strain in epitaxial films.  more » « less
Award ID(s):
2045993 2018794
NSF-PAR ID:
10524724
Author(s) / Creator(s):
; ; ; ; ;
Publisher / Repository:
American Physical Society
Date Published:
Journal Name:
Physical Review Materials
Volume:
8
Issue:
7
ISSN:
2475-9953
Page Range / eLocation ID:
L071201
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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