期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 9, 页码 11489-11496出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c22078
关键词
interfacial reconstruction; polyhedron ordering; charge ordering; hexagonal ferrite; scanning transmission electron microscopy
资金
- Chinese National Natural Science Foundation (Basic Science Center Project of NSFC) [51788104, 51527803, 11834009, 51761135131, 51525102]
- National Key Research and Development Program [2016YFB0700402]
The study demonstrates the crucial role of interfacial reconstruction in modulating the microstructures and properties of heterostructures, revealing the mechanisms through atomic-resolution imaging and spectroscopy. The reported reconstruction implies the importance of polyhedral and electronic flexibility in the formation of reconstructions and offers possibilities for constructing more functional heterostructures in the future.
Interfacial reconstruction, emanating from the symmetry breaking at the interface, plays a key role in modulating the microstructures and properties of heterostructures. The appeal of revealing such a reconstruction resides in the underlying mechanism connected to the function of heterostructures and new insights into designing a new interface device. Here, we demonstrate an interfacial reconstruction in a large lattice-mismatch system, h-LuFeO3/alpha-Al2O3 heterostructure. Combining the atomic-resolution imaging and spectroscopy of scanning transmission electron microscopy, the periodic variation of FeO immediate coordination and charge ordering of iron are revealed, indicating a strong lattice-charge coupling in the reconstruction. Such a reconstruction reported here suggests that polyhedral and electronic flexibility is important for the reconstruction formation and presents possibilities for further construction of more functional heterostructures.
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