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Jeong, Hu Young
UNIST Central Research Facilities (UCRF)
Research Interests
  • Soft material characterization such as graphene using a low kV Cs-corrected TEM
  • Insitu-TEM characterization of carbon-based materials using nanofactory STM holder for Li-ion battery application
  • Structural characterization of mesoporous materials using SEM & TEM
  • Interface analysis between various oxides and metals through Cs-corrected (S)TEM
  • Resistive switching mechanism of graphene oxide thin films for RRAM application

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Propagation Control of Octahedral Tilt in SrRuO(3)via Artificial Heterostructuring

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Title
Propagation Control of Octahedral Tilt in SrRuO(3)via Artificial Heterostructuring
Author
Jeong, Seung GyoHan, GyeongtakSong, SehwanMin, TaewonMohamed, Ahmed YousefPark, SungkyunLee, JaekwangJeong, Hu YoungKim, Young-MinCho, Deok-YongChoi, Woo Seok
Issue Date
2020-06
Publisher
WILEY
Citation
ADVANCED SCIENCE, pp.2001643
Abstract
Bonding geometry engineering of metal-oxygen octahedra is a facile way of tailoring various functional properties of transition metal oxides. Several approaches, including epitaxial strain, thickness, and stoichiometry control, have been proposed to efficiently tune the rotation and tilt of the octahedra, but these approaches are inevitably accompanied by unnecessary structural modifications such as changes in thin-film lattice parameters. In this study, a method to selectively engineer the octahedral bonding geometries is proposed, while maintaining other parameters that might implicitly influence the functional properties. A concept of octahedral tilt propagation engineering is developed using atomically designed SrRuO3/SrTiO3(SRO/STO) superlattices. In particular, the propagation of RuO(6)octahedral tilt within the SRO layers having identical thicknesses is systematically controlled by varying the thickness of adjacent STO layers. This leads to a substantial modification in the electromagnetic properties of the SRO layer, significantly enhancing the magnetic moment of Ru. This approach provides a method to selectively manipulate the bonding geometry of strongly correlated oxides, thereby enabling a better understanding and greater controllability of their functional properties.
URI
https://scholarworks.unist.ac.kr/handle/201301/36790
URL
https://onlinelibrary.wiley.com/doi/full/10.1002/advs.202001643
DOI
10.1002/advs.202001643
ISSN
2198-3844
Appears in Collections:
UCRF_Journal Papers
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