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arXiv 1002.2989cond-mat.mtrl-scicond-mat.other
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外延氧化物异质结界面八面体倾斜的抑制及其电子性质的变化

Suppression of Octahedral Tilts and Associated Changes of Electronic Properties at Epitaxial Oxide Heterostructure Interfaces

A. Borisevich, H. J. Chang, M. Huijben, M. P. Oxley, S. Okamoto, M. K. Niranjan, J. D. Burton, E. Y. Tsymbal, Y. H. Chu, P. Yu, R. Ramesh, S. V. Kalinin, S. J. Pennycook

摘要:

具有破缺平移对称性的外延氧化物界面已经成为氧化物超晶格新行为背后的中心范式。在这里,我们使用扫描透射电子显微镜,以证明一个直接的,定量的单细胞的单细胞映射的晶格参数和氧八面体旋转的BiFeO 3-La0.7Sr0.3MnO3接口,以阐明如何适应晶体对称性的变化。结合低损耗电子能量损失谱成像,我们展示了介观反铁畸变相变和阐明相关的电子性质的变化,在一个薄层直接相邻的界面。

英文摘要:

Epitaxial oxide interfaces with broken translational symmetry have emerged as a central paradigm behind the novel behaviors of oxide superlattices. Here, we use scanning transmission electron microscopy to demonstrate a direct, quantitative unit-cell-by-unit-cell mapping of lattice parameters and oxygen octahedral rotations across the BiFeO3-La0.7Sr0.3MnO3 interface to elucidate how the change of crystal symmetry is accommodated. Combined with low-loss electron energy loss spectroscopy imaging, we demonstrate a mesoscopic antiferrodistortive phase transition and elucidate associated changes in electronic properties in a thin layer directly adjacent to the interface.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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