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Strain-controlled epitaxial stabilization in ultrathin LaNiO_3 films grown by pulsed laser deposition

机译:脉冲激光沉积生长超薄LaNiO_3薄膜中的应变控制外延稳定

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摘要

We report on the epitaxial stabilization effect of strain on the growth of ultrathin heterostructures of a correlated metal LaNiO_3 (10 unit cells, ~3.84 nm; u.c. hereafter) grown on a series of perovskite oxide substrates with both tensile and compressive strain. An unusual polynomial dependence of the activation energy for surface relaxation processes in terms of the lattice misfit was observed. Our experimental investigations further demonstrate the influence of strain relaxation on the self-ordering of complex oxide compounds in the perovskite structure during high supersaturation monolayer (interrupted layer-by-layer) deposition.
机译:我们报道了应变对一系列钙钛矿氧化物衬底上生长的,具有拉伸和压缩应变的相关金属LaNiO_3(10个晶胞,〜3.84 nm;以下称u.c.)的超薄异质结构生长的外延稳定作用。在晶格失配方面,观察到了表面弛豫过程中活化能的非正常多项式依赖性。我们的实验研究进一步证明了应变松弛对高过饱和度单层(逐层间断)沉积过程中钙钛矿结构中复合氧化物化合物自排序的影响。

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