We investigated the multiscale characters of the crystal structure of the oxynitride perovskite LaTiO2N. While X-ray diffraction results identified the average structure as being centrosymmetric, we detected a signature of unknown structural deformation. By viewing the local structure, we unveiled the formation of a polar structure at the nanoscale.

中文翻译：

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钙钛矿氧化物LaTiO2N中的极性纳米区域结构。

我们研究了钙钛矿型LaTiO2N的晶体结构的多尺度特征。虽然X射线衍射结果确定平均结构为中心对称，但我们发现了未知结构变形的特征。通过观察局部结构，我们揭示了纳米级极性结构的形成。