Atomic-resolution differential phase contrast electron microscopy

Shibata, Naoya

doi:10.2109/jcersj2.19118

Cited by 17 publications

(8 citation statements)

References 20 publications

(15 reference statements)

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“…Atomic resolution was finally achieved upon the advent of transformational aberration correction schemes, which were first successfully demonstrated in the late 1990s and have been increasingly widely adopted over the past decade [198][199][200][201] . In fact, the spatial resolution of an aberrationcorrected STEM has now fallen below the Bohr radius of 0.53 pm [202][203][204][205] .…”

Section: Vortex Matter Genome Using Artificial Intelligence: Critical...mentioning

confidence: 99%

Perspective: Challenges and Transformative Opportunities in Superconductor Vortex Physics

Eley,

Glatz,

Willa

2021

Preprint

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In superconductors, the motion of vortices introduces unwanted dissipation that is disruptive to applications. Fortunately, material defects can immobilize vortices, acting as vortex pinning centers, which engenders dramatic improvements in superconductor material properties and device operation. This has motivated decades of research into developing methods of tailoring the disorder landscape in superconductors to increase the strength of vortex pinning. Yet efficacious materials engineering still alludes us. The electromagnetic properties of real (disordered) superconducting materials cannot yet be reliably predicted, such that designing superconductors for applications remains a largely inefficient process of trial and error. This is ultimately due to large gaps in our knowledge of vortex dynamics: the field is challenged by the extremely complex interplay between vortex elasticity, vortex-vortex interactions, and material disorder.In this Perspective, we review obstacles and recent successes in understanding and controlling vortex dynamics in superconducting materials and devices. We further identify major open questions and discuss opportunities for transformative research in the field. This includes improving our understanding of vortex creep, determining and reaching the ceiling for the critical current, advanced microscopy to garner accurate structure-property relationships, frontiers in predictive simulations and the benefits of artificial intelligence, as well as controlling and exploiting vortices in quantum information applications.

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Section: Vortex Matter Genome Using Artificial Intelligence: Critical...mentioning

confidence: 99%

Perspective: Challenges and Transformative Opportunities in Superconductor Vortex Physics

Eley,

Glatz,

Willa

2021

Preprint

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“…With such measurements, one is essentially measuring shifts in the center of "mass" (CoM) of the BF disk [9]. Especially at higher resolutions where the field varies on a scale similar to or smaller than the size of the probe itself, the BF disk does not always shift rigidly [10].…”

Section: Measuring the Electrostatic Potentialmentioning

confidence: 99%

$\textit{ab initio}$ description of bonding for transmission electron microscopy

Madsen,

Pennycook,

Susi

2020

Preprint

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The simulation of transmission electron microscopy (TEM) images or diffraction patterns is often required to interpret their contrast and extract specimen features. This is especially true for high-resolution phase-contrast imaging of materials, but model-based reconstructions in TEM are widely used across the physical and biological sciences. Since electron scattering is dominated by the nuclear cores, the scattering potential is typically described by the widely applied independent atom model. This approximation is fast and accurate, especially for annular dark-field contrast, but it completely neglects valence bonding and its effect on the transmitting electrons. However, an emerging trend in electron microscopy is to use new instrumentation and methods to extract the maximum amount of information from each electron. This is evident in the increasing popularity of techniques such as 4D-STEM combined with ptychography in materials science, and cryogenic microcrystal electron diffraction in structural biology, where subtle differences in the scattering potential may be both measurable and contain additional insights. Thus, there is increasing interest in electron scattering simulations based on electrostatic potentials obtained from first principles, mainly via density functional theory. In this Review, we discuss the motivation and basis for these developments, survey the pioneering work that has been published thus far, and give our outlook for the future. We

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“…Recently, the rapid development of aberration correction scanning transmission electron microscopy (AC-STEM), with a spatial resolution even smaller than the size of the hydrogen Bohr radius (∼53 pm), provided a key breakthrough to capture atomic-scale evidence. 8 Among others, combining with the annular dark field (ADF) and enhanced annular bright-field (eABF) STEM technologies, atomic-scale structural information on both cation and anion can be simultaneously obtained, enabling an examination of the relationship between polarization and structure.…”

mentioning

confidence: 99%

“…Especially, for relaxor ferroelectrics with complex doping, exhibiting dispersion phase transition and frequency dispersion significantly enhances the electrical performance. − The origin of this phenomenon was attributed to polar nanodomains or nanoregions in relaxors; , however, atomic-scale evidence has been challenging to obtain and scarce to date. Recently, the rapid development of aberration correction scanning transmission electron microscopy (AC-STEM), with a spatial resolution even smaller than the size of the hydrogen Bohr radius (∼53 pm), provided a key breakthrough to capture atomic-scale evidence . Among others, combining with the annular dark field (ADF) and enhanced annular bright-field (eABF) STEM technologies, atomic-scale structural information on both cation and anion can be simultaneously obtained, enabling an examination of the relationship between polarization and structure.…”

mentioning

confidence: 99%

Decoding the Atomic-Scale Structural Origin of Large Strain Performance in BNT-6BT Based Relaxor Ferroelectrics

Liu

Zheng

et al. 2023

J. Phys. Chem. Lett.

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The relationship between matter properties and their atomic-scale structures is a challenging investigation. For relaxor ferroelectrics, correlating the relaxor mechanisms on the atomic scale to properties is still ambiguous. Here, the correlation between the atomic-scale structure and strain performance of 0.94 Bi0.5Na0.5TiO3-0.06BaTiO3 (94BNT-6BT) and 0.93 Bi0.5Na0.5TiO3-0.06BaTiO3-0.01BaZrO3 (93BNT-6BT-1BZ) is reported. The δTi–Bi/Na displacement vector map based on the annular dark field (ADF) scanning transmission electron microscopy (STEM) image demonstrates the coexistence of tetragonal (T) and rhombohedral (R) phases of the resulting ceramics, and BZ doping increases the proportion of the T phase. Furthermore, the enhanced annular bright field (eABF) STEM image demonstrates that BZ doped ceramics exhibit obvious oxygen octahedral tilt. The oxygen octahedral tilt increased gradually from the domain wall to the inner place of the nanodomain, indicating a regional consistency, which results in enhancement of the relaxor performance and stain property. This study opens exciting opportunities to the design of relaxor ferroelectrics with large strain for high-displacement actuator applications.

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Atomic-resolution differential phase contrast electron microscopy

Cited by 17 publications

References 20 publications

Perspective: Challenges and Transformative Opportunities in Superconductor Vortex Physics

Perspective: Challenges and Transformative Opportunities in Superconductor Vortex Physics

$\textit{ab initio}$ description of bonding for transmission electron microscopy

Decoding the Atomic-Scale Structural Origin of Large Strain Performance in BNT-6BT Based Relaxor Ferroelectrics

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