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Open AccessDoes the Dirac Cone Exist in Silicene on Metal Substrates?
Absence of the Dirac cone due to a strong band hybridization is revealed to be a common feature for epitaxial silicene on metal substrates according to our first-principles calculations for silicene on Ir, Cu,...
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Article
Open AccessSub-wavelength modulation of χ(2) optical nonlinearity in organic thin films
Modulating the second-order nonlinear optical susceptibility (χ(2)) of materials at the nanoscale represents an ongoing technological challenge for a variety of integrated frequency conversion and nonlinear nanop...
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Article
Open AccessArtificial two-dimensional polar metal at room temperature
Polar metals, commonly defined by the coexistence of polar crystal structure and metallicity, are thought to be scarce because the long-range electrostatic fields favoring the polar structure are expected to b...
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Article
Open AccessThree-dimensional atomic scale electron density reconstruction of octahedral tilt epitaxy in functional perovskites
Octahedral tilts are the most ubiquitous distortions in perovskite-related structures that can dramatically influence ferroelectric, magnetic, and electronic properties; yet the paradigm of tilt epitaxy in thi...
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Article
Correlating the three-dimensional atomic defects and electronic properties of two-dimensional transition metal dichalcogenides
The electronic, optical and chemical properties of two-dimensional transition metal dichalcogenides strongly depend on their three-dimensional atomic structure and crystal defects. Using Re-doped MoS2 as a model ...
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Article
Open AccessMaking EuO multiferroic by epitaxial strain engineering
Multiferroics are materials exhibiting the coexistence of ferroelectricity and ideally ferromagnetism. Unfortunately, most known magnetoelectric multiferroics combine ferroelectricity with antiferromagnetism o...
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Article
Determining the three-dimensional atomic structure of an amorphous solid
Amorphous solids such as glass, plastics and amorphous thin films are ubiquitous in our daily life and have broad applications ranging from telecommunications to electronics and solar cells1–4. However, owing to ...
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Article
Subterahertz collective dynamics of polar vortices
The collective dynamics of topological structures1–6 are of interest from both fundamental and applied perspectives. For example, studies of dynamical properties of magnetic vortices and skyrmions3,4 have not onl...
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Three-dimensional atomic packing in amorphous solids with liquid-like structure
Liquids and solids are two fundamental states of matter. However, our understanding of their three-dimensional atomic structure is mostly based on physical models. Here we use atomic electron tomography to exp...
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Article
Open AccessAccurate real space iterative reconstruction (RESIRE) algorithm for tomography
Tomography has made a revolutionary impact on the physical, biological and medical sciences. The mathematical foundation of tomography is to reconstruct a three-dimensional (3D) object from a set of two-dimens...
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Article
Three-dimensional atomic structure and local chemical order of medium- and high-entropy nanoalloys
Medium- and high-entropy alloys (M/HEAs) mix several principal elements with near-equiatomic composition and represent a model-shift strategy for designing previously unknown materials in metallurgy1–8, catalysis
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Atomic-scale identification of active sites of oxygen reduction nanocatalysts
Heterogeneous nanocatalysts play a crucial role in both the chemical and energy industries. Despite substantial advancements in theoretical, computational and experimental studies, identifying their active sit...
