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Extended Oxygen Octahedral Tilt Proximity near Oxide Heterostructures

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Title
Extended Oxygen Octahedral Tilt Proximity near Oxide Heterostructures
Author(s)
Junsik Mun; Eun Kyo Ko; Kang, Baekjune; Gil, Byeongjun; Choong H. Kim; Sungsoo Hahn; Jeongkeun Song; Zhu, Yimei; Sohn, Changhee; Tae Won Noh; Miyoung Kim
Publication Date
2023-02
Journal
NANO LETTERS, v.23, no.3, pp.1036 - 1043
Publisher
AMER CHEMICAL SOC
Abstract
The oxide interfaces between materials with different structural symmetries have been actively studied due to their novel physical properties. However, the investigation of intriguing interfacial phenomena caused by the oxygen octahedral tilt (OOT) proximity effect has not been fully exploited, as there is still no clear understanding of what determines the proximity length and what the underlying control mechanism is. Here, we achieved scalability of the OOT proximity effect in SrRuO3 (SRO) by epitaxial strain near the SRO/SrTiO3 heterointerface. We demonstrated that the OOT proximity length scale of SRO is extended from 4 unit cells to 14 unit cells by employing advanced scanning transmission electron microscopy. We also suggest that this variation may originate from changes in phonon dispersions due to electron-phonon coupling in SRO. This study will provide in-depth insights into the structural gradients of correlated systems and facilitate potential device applications.
URI
https://pr.ibs.re.kr/handle/8788114/13120
DOI
10.1021/acs.nanolett.2c04633
ISSN
1530-6984
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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