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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Anisotropy in static and terahertz dynamic conductivities across in-plane axes of lanthanum nickel oxide thin films
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Anisotropy in static and terahertz dynamic conductivities across in-plane axes of lanthanum nickel oxide thin films

机译：静态和太赫兹的各向异性，穿过镧氧化镍薄膜的平面内轴线

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摘要

The bulk rhombohedral LaNiO3 is a unique member of the rare-earth nickelate RNiO3 family devoid of any phase transition down to low temperatures, in addition, it lies in the proximity of quantum critical point. In this paper, we show that the bi-axial strain induces pronounced disparity both in static and dynamic transport when measured across two in-plane crystal axes of an orthorhombic LaNiO3 thin film. A maximum in-plane transport anisotropy of 50% at 30K is observed in dc conductivity when measured across [1 0 0](omicron) and [0 1 0](omicron) directions. Similar in-plane dynamic transport anisotropy i.e. dissimilar disorder strengths appear across two orthogonal axes in oxygen deficient film. In oxygen stoichiometric film too, a pure Drude-type THz conductivity transforms to a near Drude-type across in-plane orientations. This unique in-plane transport anisotropy, unveiled in a broad range of dc to THz frequencies, underlines a strong structure-property relation and emphasizes the need to engineer the charge transport along appropriate crystal axis for evaluating the application potential of rare earth nickelates.
机译：散装rhombohedral lanio3是稀土镍氢镍系列的独特成员，其缺乏任何相位过渡到低温，另外，它位于量子临界点的附近。在本文中，我们表明双轴应变在横跨正晶LANIO3薄膜的两个面内晶轴上测量时静态和动态传输中的明显差异。当在[1 0 0]（OMICRON）和[010]（OMICRON）方向上测量时，在DC电导率下观察到在30K处的最大面内传输各向异性。类似的平面内动态传输各向异性I.E。缺氧膜中的两个正交轴上出现不同的紊乱强度。在氧气化学计量膜中，纯润滑型THz电导率转变为横切面向面内取向的近底晶型。这种独特的面内传输各向异性，在广泛的DC到THz频率下揭开了强大的结构性质关系，并强调需要沿着适当的晶体轴设计充电传输，以评估稀土镍的应用潜力。

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