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Atomic-resolution study on the interface structure and strain state reversion of the Bi2Sr2CuO6+delta/MgO heterostructure
Zhang, Jian1,2; Wang, Weizhen3; Wang, Nan1,2; Wang, Mingguang1,2; Qi, Yang1,2
Corresponding AuthorWang, Mingguang(wangmg@imp.neu.edu.cn) ; Qi, Yang(qiyang@imp.neu.edu.cn)
2021-06-15
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
Volume592Pages:291-295
AbstractDue to the crucial influence of interface structure and strain on the performance of heterojunctions, they have received extensive attention in recent years. In this article, the interface structure and strain of the Bi2Sr2CuO6+delta d(Bi-2201)/MgO superconducting heterojunction prepared by molecular beam epitaxy were investigated by aberration-corrected high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), energy-dispersive X-ray spectroscopy (EDX), and geometric phase analysis (GPA). The interfacial atomic sequence is determined as MgO-(CuO-CuO-Cu/BiO)-(Bi-2201)(n), where a 0.53 nm thick CuO interlayer accompanied by Bi/Cu atomic co-occupation is observed between the Bi-2201 film and the MgO substrate. In addition, there is a typical coherent lattice-matching epitaxial interface between CuO/MgO with no defects and a semi-coherent domain-matching epitaxial interface between Bi-2201/CuO accompanied by an ideal misfit dislocation network. Because misfit dislocations almost compensate for the strain caused by lattice mismatch, the final Bi-2201 film undergoes in-plane compressive strain (epsilon(xx) similar to -0.573%) rather than expected tensile strain relative to bulk Bi-2201, which is attributed to the thermal expansion mismatch. The compressive strain gradually releases as the distance from the heterointerface increases. (C) 2021 Elsevier Inc. All rights reserved.
KeywordHigh-T-c superconductors Thin films Interface structure Microstructure Domain matching epitaxy Thermal expansion mismatch Residual strain
Funding OrganizationNational Natural Science Foundation of China ; China Postdoctoral Science Foundation ; Postdoctoral Foundation of Northeastern University
DOI10.1016/j.jcis.2021.02.063
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[61961116] ; China Postdoctoral Science Foundation[2018M631801] ; Postdoctoral Foundation of Northeastern University[20180301]
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000634142400002
PublisherACADEMIC PRESS INC ELSEVIER SCIENCE
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/162077
Collection中国科学院金属研究所
Corresponding AuthorWang, Mingguang; Qi, Yang
Affiliation1.Northeastern Univ, Sch Mat Sci & Engn, Dept Mat Phys & Chem, Shenyang 110819, Liaoning, Peoples R China
2.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Liaoning, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Jian,Wang, Weizhen,Wang, Nan,et al. Atomic-resolution study on the interface structure and strain state reversion of the Bi2Sr2CuO6+delta/MgO heterostructure[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2021,592:291-295.
APA Zhang, Jian,Wang, Weizhen,Wang, Nan,Wang, Mingguang,&Qi, Yang.(2021).Atomic-resolution study on the interface structure and strain state reversion of the Bi2Sr2CuO6+delta/MgO heterostructure.JOURNAL OF COLLOID AND INTERFACE SCIENCE,592,291-295.
MLA Zhang, Jian,et al."Atomic-resolution study on the interface structure and strain state reversion of the Bi2Sr2CuO6+delta/MgO heterostructure".JOURNAL OF COLLOID AND INTERFACE SCIENCE 592(2021):291-295.
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