arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.07652cond-mat.mtrl-sci
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扫描透射电镜数据的单投影三维重建算法

A single-projection three-dimensional reconstruction algorithm for scanning transmission electron microscopy data

Hamish G. Brown, Philipp M. Pelz, Shang-Lin Hsu, Zimeng Zhang, Ramamoorthy Ramesh, Katherine Inzani, Evan Sheridan, Sinéad M. Griffin, Marcel Schloz, Thomas C. … 展开作者

Hamish G. Brown, Philipp M. Pelz, Shang-Lin Hsu, Zimeng Zhang, Ramamoorthy Ramesh, Katherine Inzani, Evan Sheridan, Sinéad M. Griffin, Marcel Schloz, Thomas C. Pekin, Christoph T. Koch, Scott D. Findlay, Leslie J. Allen, Mary C. Scott, Colin Ophus, Jim Ciston

摘要:

对三维纳米结构的兴趣增加,推动了能够在纳米级或纳米级以下三维成像的电子显微镜技术。我们提出了一种重建算法,作为输入的一个焦点系列的四维扫描透射电子显微镜(4D-STEM)数据。我们将该方法应用于铅铱酸盐,铅$_2$铱$_2$ O $_7$,钇稳定的氧化锆,Y $_{0.095}$ Zr $_{0.905}$ O $_2$,异质结构从数据采集与样品在一个单一的平面视图取向,沿光束方向堆叠的外延层。我们表明,Pb-Ir原子柱是可见的重建体积的最上层。我们比较这种方法的替代技术的深度切片使用微分相衬扫描透射电子显微镜(DPC-STEM)和多层重叠关联重建。

英文摘要:

Increasing interest in three-dimensional nanostructures adds impetus to electron microscopy techniques capable of imaging at or below the nanoscale in three dimensions. We present a reconstruction algorithm that takes as input a focal series of four-dimensional scanning transmission electron microscopy (4D-STEM) data. We apply the approach to a lead iridate, Pb$_2$Ir$_2$O$_7$, and yttrium-stabilized zirconia,Y$_{0.095}$Zr$_{0.905}$O$_2$ , heterostructure from data acquired with the specimen in a single plan-view orientation, with the epitaxial layers stacked along the beam direction. We demonstrate that Pb-Ir atomic columns are visible in the uppermost layers of the reconstructed volume. We compare this approach to the alternative techniques of depth sectioning using differential phase contrast scanning transmission electron microscopy (DPC-STEM) and multislice ptychographic reconstruction.

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