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Dynamic Field Modulation of the Octahedral Framework in Metal Oxide Heterostructures
Author(s) -
Liu Huajun,
Dong Yongqi,
Xu Dongwei,
Karapetrova Evguenia,
Lee Sungsik,
Stan Liliana,
Zapol Peter,
Zhou Hua,
Fong Dillon D.
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201804775
Subject(s) - octahedron , materials science , heterojunction , perovskite (structure) , oxide , oxygen , field (mathematics) , chemical physics , nanotechnology , optoelectronics , crystallography , crystal structure , chemistry , mathematics , organic chemistry , metallurgy , pure mathematics
Control over the oxygen octahedral framework is widely recognized as key to the design of functional properties in perovskite oxide heterostructures. Although the oxygen octahedral framework can be manipulated during synthesis, the as‐grown oxygen octahedra generally remain fixed, preventing the development of adaptive behavior in electronic and ionotronic systems. Here, it is demonstrated that the oxygen octahedral framework can be dynamically and reversibly manipulated by an electric field through the coupling with oxygen vacancies. Studying model WO 3 heterostructures during ionic liquid gating with a combination of in situ X‐ray scattering and spectroscopy, it is shown that large changes in electronic properties can arise due to the increased flexibility of the octahedral network at high vacancy concentrations. The results describe a generic framework for the construction of dynamic systems and devices with an array of field‐tunable properties.