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首页> 外文期刊>Crystal growth & design >Atomically Architected Silicon Pyramid Single-Crystalline Structure Supporting Epitaxial Material Growth and Characteristic Magnetism
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Atomically Architected Silicon Pyramid Single-Crystalline Structure Supporting Epitaxial Material Growth and Characteristic Magnetism

机译：原子上架构的硅金字塔单晶结构支持外延材料生长和特征磁性

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摘要

The control of three-dimensional (3D) geometrical shapes is one of important approaches that contribute the development of new functionalities in material science. We produced 3D Si pyramids with atomically flat and reconstructed {111} facet surfaces supporting atomically resolved material growth in 3D space for the first time. The complex 4-fold clean 7×7 and 2×2-Fe low-energy electron diffraction (LEED) patterns reflecting the pyramidal geometry showed the realization of atomically reconstructed facet surfaces on the 3D patterned Si. Cross-sectional transmission electron microscopy (TEM) revealed the epitaxial heterointerfaces between Fe nanofilm and Si facet surfaces. The LEED and TEM results indicate the applicability of the Si pyramid as a supporting substrate for arbitrarily oriented 3D functional structures. The pyramidal Fe nanofilm displayed magnetic properties depending on the geometric shape, owing to the facet surfaces and the sharp facet edges. The unique anisotropic magnetization behavior of the 3D pyramid shape indicates that the epitaxial growth of an arbitrary geometry by virtue of the atomically ordered substrate surfaces in 3D space can contribute to the modification of the functionality.
机译：三维几何形状的控制是材料科学中开发新功能的重要途径之一。我们首次制作了具有原子平面和重建{111}小平面表面的3D硅金字塔，支持3D空间中原子解析的材料生长。复杂的4倍清洁7×7和2×2-Fe低能电子衍射（LEED）图案反映了金字塔的几何结构，表明在3D图案化Si上实现了原子重建的小平面表面。横截面透射电子显微镜（TEM）显示了Fe纳米薄膜和Si小面表面之间的外延异质界面。LEED和TEM结果表明，硅棱锥作为任意取向三维功能结构的支撑衬底是可行的。金字塔形铁纳米薄膜由于其小平面和尖锐的小平面边缘，显示出与几何形状有关的磁性。三维金字塔形状独特的各向异性磁化行为表明，借助于三维空间中原子有序的衬底表面，任意几何形状的外延生长有助于功能性的修改。

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  • 来源
    《Crystal growth & design》 |2021年第2期|共8页
  • 作者

    Aydar Irmikimov; Liliany N. Pamasi; Azusa N. Hattori; Takaaki Higashi; Shunta Takahashi; Emilia E. Hashamova; Xiaoqian Shi; Fangzhun Guo; Nobuyoshi Hosoito; Ai I. Osaka; Hidekazu Tanaka; Ken Hattori;

  • 作者单位

    Graduate School of Science and Technology Nara Institute of Science and Technology;

    Graduate School of Science and Technology Nara Institute of Science and Technology;

    Institute of Scientific and Industrial Research Osaka University;

    Graduate School of Science and Technology Nara Institute of Science and Technology;

    Graduate School of Science and Technology Nara Institute of Science and Technology;

    Graduate School of Science and Technology Nara Institute of Science and Technology;

    Institute of Mechanical Engineering Dalian Jiaotong University;

    Institute of Mechanical Engineering Dalian Jiaotong University;

    Graduate School of Science and Technology Nara Institute of Science and Technology;

    Institute of Scientific and Industrial Research Osaka University;

    Institute of Scientific and Industrial Research Osaka University;

    Graduate School of Science and Technology Nara Institute of Science and Technology;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
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