论文标题
nd $ _ {n+1} $ ni $ _ {n} $ o $ $ $ _ {3n+1} $ ruddlesden-popper镍薄膜的合成和电子特性
Synthesis and electronic properties of Nd$_{n+1}$Ni$_{n}$O$_{3n+1}$ Ruddlesden-Popper nickelate thin films
论文作者
论文摘要
稀土镍含量具有多种集体现象，包括金属到绝缘体的跃迁，磁相跃迁以及化学还原后的超导性。在这里，我们证明了使用分子束同学，在ruddlesden-popper形式中展示了分层镍的外延稳定。通过优化父perovskite ndnio $ _3 $的化学计量，我们可以重复合成$ n = 1-5 $成员化合物。 O $ K $和Ni $ L $边缘的X射线吸收光谱表明，随着我们从$ n = 1 $ n = 1 $ n = \ n = \ n = \ n = fty $。 $ n = 3-5 $化合物表现出较弱的滞后金属到绝缘体的过渡，其过渡温度会降低，而订单增加了ndnio $ _3 $（$ n = \ n = \ infty）$。
The rare-earth nickelates possess a diverse set of collective phenomena including metal-to-insulator transitions, magnetic phase transitions, and, upon chemical reduction, superconductivity. Here, we demonstrate epitaxial stabilization of layered nickelates in the Ruddlesden-Popper form, Nd$_{n+1}$Ni$_n$O$_{3n+1}$, using molecular beam epitaxy. By optimizing the stoichiometry of the parent perovskite NdNiO$_3$, we can reproducibly synthesize the $n = 1 - 5$ member compounds. X-ray absorption spectroscopy at the O $K$ and Ni $L$ edges indicate systematic changes in both the nickel-oxygen hybridization level and nominal nickel filling from 3$d^8$ to 3$d^7$ as we move across the series from $n = 1$ to $n = \infty$. The $n = 3 - 5$ compounds exhibit weakly hysteretic metal-to-insulator transitions with transition temperatures that depress with increasing order toward NdNiO$_3$ ($n = \infty)$.
