Articles tagged with Electron Density
Bacteria breathe deep underground without oxygen using nanowires to dispose of excess electrons. Yale scientists found that electrons move rapidly through the wires via a wave-like behavior rather than hopping, defying classical Newtonian laws. This discovery has significant implications for quantum sensing and computation.
The Chinese Meridian Project study found a dramatic 98% reduction in ionospheric electron density during the May 10-12 super geomagnetic storm, leading to complete loss of ionospheric backscatter echoes. The team also observed significant hemispheric asymmetry, with enhanced electron density in the Southern Hemisphere.
Researchers mapped electron density in the ionosphere and observed unique 3D wave patterns after the 2024 Noto Peninsula Earthquake, showing earthquakes generate waves from multiple points along the entire fault line. The study provides new insights into how earthquakes affect the upper atmosphere.
A research team developed a novel strategy to balance high catalytic activity and durability under industrial-level conditions. They constructed a MOF@POM superstructure that undergoes an in-situ transformation into a single-layer CoFe hydroxide catalyst, exhibiting exceptional performance in alkaline electrolytes.
A team of researchers from the Dalian Institute of Chemical Physics has developed a high-water-soluble pyrene tetraone derivative that enhances the energy density of aqueous organic flow batteries. The new monomer achieves an ultra-high volumetric capacity of approximately 90 Ah/L, with excellent stability and cycling performance.
The Mircea Dincă Group at Princeton University has developed a sodium-ion cathode using bis-tetraaminobenzoquinone (TAQ) that outperforms traditional lithium-ion cathodes. This innovation has the potential to address the challenges of limited resources and scalability in battery technology, offering a sustainable and cost-effective alt...
The comprehensive review highlights the impact of electron density topology on materials science and chemistry. It reveals connections between methods, including NG QTAIM, and their potential for simulating complex reactions, enabling more realistic computing and understanding of matter.
Researchers developed a novel AI approach to predict atomic-level chemical bonding information in 3D space, bypassing traditional supercomputer simulations. This methodology accelerates calculations by learning chemical bonding information using neural network algorithms from computer vision.
Researchers at Harvard University have developed a new device that can easily twist and study 2D materials, opening up new possibilities for discovering new phases of matter. This innovation uses micro-electromechanical systems to control the twist angle, making it easier to produce unique samples and study their properties.
Researchers at the University of Buffalo have successfully fabricated the world's highest-performing high-temperature superconducting (HTS) wire segment, achieving critical current density and pinning force values previously unseen. The breakthrough could significantly improve the price-performance metric for commercial coated conducto...
A team of researchers from Japan have employed an innovative technique to directly observe the origin of FSDP and the atomic density fluctuations in silica (SiO2) glass. The study reveals alternating arrangements of chain-like columnar atomic configurations and interstitial tube-like voids.
Researchers from Tokyo Institute of Technology experimentally revealed that high-density Ca introduction enhances superconductivity in graphene-calcium compounds through confinement epitaxy, leading to increased critical temperatures. This breakthrough could enable the development of C6CaC6 superconductors with wide applicability in qu...
Researchers have discovered a new type of pyrochlore-type oxyfluoride with high ionic conductivity and air stability, suitable for electric vehicles, airplanes, and miniaturization applications. The material exhibits low activation energy and operates within a wide temperature range.
Researchers at City University of Hong Kong developed mixed-dimensional anti-ambipolar transistors for multifunctional electronics, enabling higher information density and lower power consumption. The new technology paves the way for simplified chip circuit design and versatile applications in digital and analog signal processing.
A team of researchers developed a hexagonal BaTiO3−xNy oxynitride catalyst with basicity comparable to that of superbases. The substitution of nitride ions and oxygen vacancies into face-sharing Ti2O9 dimer sites increases the electron density, resulting in a highly basic catalyst.
Researchers from GIST have developed a new electrode using Schottky junctions to overcome the conductance limit of active catalysts, achieving high-performance water splitting and hydrogen evolution reactions. The electrode demonstrated remarkable current density and durability during continuous operation for 10 days.
Researchers develop a highly active, precious metal-free catalyst for ammonia decomposition. The new Ni-based catalyst outperforms conventional alternatives at lower temperatures, offering a promising solution for hydrogen production from ammonia.
Researchers discovered 'oxygen hole' formation in LiNiO2 cathodes accelerates degradation and release of oxygen. Computational studies revealed nickel charge remains stable while oxygen undergoes changes during charging.
Researchers at Cornell University have discovered and visualized a crystalline yet superconducting state in Uranium Ditelluride (UTe2), a previously unknown state of topological quantum matter. This 'spin-triplet electron-pair crystal' exhibits a new form of electronic quantum matter called Cooper-pair density waves.
Scientists have observed the direct visualization of a zero-field pair density wave in an iron-based superconductor, EuRbFe4As4, without a magnetic field. This discovery paves the way for further research into room-temperature superconductivity and its potential applications.
Researchers use spectroscopic imaging scanning tunneling microscope to map atomic positions and measure electric charge, revealing link between electron density and atomic arrangements. The discovery sheds light on the emergence of a 'charge density wave' that distorts lattice vibrations and locks atoms in place.
Researchers have identified extreme field reversals around FRB 20190520B, a persistently active repeating Fast Radio Burst. This finding provides insights into the turbulent magnetized environment surrounding the cosmic explosion, which may be caused by signal passage through a companion's halo.
A new model of the Earth's ionosphere has been developed using neural networks, which can reconstruct the topside ionosphere with high accuracy. This improvement is crucial for satellite navigation systems, such as global navigation satellite systems (GNSS), which require precise correction of radio signals to mitigate ionospheric delays.
Researchers at Kyoto University have successfully created stable plasmas using microwaves, a key step towards harnessing nuclear fusion's massive energy potential. The team identified three crucial steps in plasma production and used Heliotron J to generate the dense plasmas.
Researchers developed an optical microscope to observe electron transfer in gold nanoparticles, providing a new strategy for studying photocatalysts at the single particle level. The technology enables selective induction of electron excitation and quantitative analysis of its effects on semiconductor photocatalysts.
Brazilian researchers used computer simulations to investigate the superconducting behavior of a dimolybdenum nitride monolayer, finding that it became superconductive at relatively high temperatures and showed strong correlation with strain applied.
A new method for detecting tsunamis using existing GPS satellites has been developed by an international team of researchers. The system can issue warnings within 15 minutes of an earthquake or tsunami, and can be implemented in countries with a sparse GPS network.
AV3Sb5 kagome metals exhibit unusual quantum phenomena such as high-temperature superconductivity. Researchers identified four Van Hove singularities near the Fermi level, which enhance correlation effects and lead to competing orders.
Researchers discovered a phase transition from charge-density-wave order to electronic nematicity in Kagome superconductor CsV3Sb5 at 35 Kelvin. This novel nematicity has Z3 symmetry, distinct from high-temperature superconductors.
(TaSe4)2I fails to exhibit expected magnetoconductivity, sparking debate on axionic behavior in condensed matter. Researchers aim to investigate nonlinear dynamics and inspire new techniques for confirming axion counterparts.
Scientists have developed a new technique called small-molecule serial femtosecond X-ray crystallography (smSFX) that can reveal the structures of not-so-neat-and-tidy materials. This method uses an exceptional X-ray laser and custom-built image processing algorithms to diffract individual granules of powders, providing a precise sharp...
Researchers at GIST used ultrafast X-ray pulses to study warm dense copper electrons, revealing that bonds harden before melting. The findings could improve understanding of extraordinary material properties and their underlying mechanisms.
Scientists confirm existence of sigma-hole, a phenomenon previously predicted but never directly observed. This breakthrough enables understanding of interactions between individual atoms or molecules, facilitating refinement of material and structural properties.
A team of researchers from Harvard and MIT observed hydrodynamic electron flow in three-dimensional tungsten ditelluride for the first time using a new imaging technique. The findings provide a promising avenue for exploring non-classical fluid behavior in hydrodynamic electron flow, such as steady-state vortices.
The Galactic Plane Pulsar Snapshot (GPPS) has discovered 201 pulsars using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), including many very faint and millisecond pulsars. The survey reveals more electrons in the Milky Way's spiral arms than previously known.
The study uses THz wave absorption to probe the temporal evolution of quasifree electrons in laser-induced plasma, showing a unique two-step decay characteristic. The researchers also find that as electron density increases, traps related to bound states saturate, leaving many electrons unsolvated.
Researchers at Nagoya University have directly observed the spatial distribution of a single valence electron in titanium oxide, revealing a butterfly-shaped distribution. The new Fourier synthesis method, called core differential Fourier synthesis (CDFS), can determine orbital states in materials regardless of their physical properties.
A study published in the American Journal of Roentgenology found that spectral CT with electron density imaging can improve the assessment of lung lesion extent in patients with COVID-19. The results showed that lesion extent was easier to ascertain on electron density images, and ground-glass opacities were more conspicuous.
Researchers discovered a new approach to control chemical reaction reactivity using a single gold electrode, which can behave like multiple functional groups by switching applied voltage. This 'electro-inductive effect' enables in-situ tuning of electronic property and reactivity in the middle of a reaction.
Hyeon K. Park, a renowned plasma physicist, has made seminal contributions to fusion plasma diagnostics through his original works in ECEI and MIR. His research enhanced the synergies with numerical modeling and theories, leading to rich discoveries of novel plasma physics phenomena.
Researchers have developed a novel 3D imaging technique called COBRA that visualizes the atomic and electron density structure of complex perovskite crystal structures. This breakthrough enables the study of materials with unique properties, such as ferroelectricity and superconductivity.
Scientists establish direct connection between macroscopic electric polarizations and microscopic electron densities, opening route for understanding and tailoring ferroelectric material properties. Ultrafast x-ray diffraction tool provides unique insight into complex material properties.
Researchers Ana María Valencia García and Marília Junqueira Caldas resolved a longstanding controversy about the calculation of defect electronic structures in graphene. They used a hybrid functional method, which yielded results compatible with experimental data, resolving divergences between different simulation methods.
Researchers developed a novel localized orbital scaling correction (LOSC) framework to eliminate delocalization errors in density functional theory. The LOSC function achieves size-consistent removal of errors, improving the accuracy of Kohn-Sham calculations, particularly for large systems.
A team at Berkeley Lab has precisely measured the band gap and tuning mechanism of monolayer molybdenum disulfide, a 2-D semiconducting material. The study reveals a powerful tuning mechanism and interrelationship between electronic and optical properties.
Researchers discovered a new type of magnet in three layers of graphene, allowing for the observation of electronic interactions. By reducing imperfections, they enabled the development of coordinated electronic interactions, which is essential for creating electronic devices using graphene.
Recent studies in density functional theory (DFT) have raised concerns about the accuracy of approximations used in computational chemistry. Researchers found that even with improved energy calculations, the quality of electron density simulations worsened over time. This contradiction highlights a fundamental flaw in DFT's approach.
Researchers found that local electron pairs form a 'superfluid' that flows without resistance, enabling the material to conduct electricity at unusually high temperatures. This discovery challenges standard theory of superconductivity and paves the way for engineering materials that become superconducting at room temperature.
Researchers have experimentally confirmed a mathematical model describing the distribution of delocalized electrons in molecules and crystals. The study uses X-ray diffraction data to demonstrate the approach's ability to detect electron delocalization, paving the way for new understanding of chemical bonding.
Researchers use Ptychographic X-ray computed tomography to visualize food structures on the nanometer scale, revealing details about fat and water distribution. This breakthrough has promising prospects for improving food consistency and reducing costs in the industry.
Researchers at Brookhaven National Laboratory and Cornell University have characterized a key arrangement of electrons in a high-temperature superconductor. The study identifies the atomic-scale origins and influences that produce the density wave in cuprates, revealing a link between the electron density wave and pseudogap phase.
A new tool, phenix.diffuse, enables calculating diffuse scattering from Protein Data Bank-formatted structural ensembles, addressing the need for computational modelling and validation tools. The technique helps extract evidence of concerted motion in single crystal forms, where high-quality data sets are limited by long X-ray exposures.
Researchers at National Institute of Fusion Science have developed a dispersion interferometer to measure electron density in atmospheric pressure low-temperature plasma with high accuracy. This breakthrough enables precise control over plasma parameters, leading to optimal plasmas for medicine and biology applications.
Scientists in Jülich have discovered a combination of materials that strengthens Friedel oscillations and bundles them in different directions, creating 'giant anisotropic charge density oscillations'. These oscillations can be used to enhance nanoelectronic components and filter magnetic information.
Researchers have discovered a novel form of superconductivity in two-dimensional electron liquids, characterized by the presence of quantum point contacts. These tiny channels enable the flow of superconducting currents, but with a twist: the spin degree of freedom is broken, allowing for new types of electron transport.
Researchers have discovered a link between the disappearance of certain electrons' periodic arrangements and the emergence of freely flowing electrons in a material, leading to enhanced superconductivity. The findings may help scientists engineer ways to boost operating temperatures for real-world energy-saving applications.
The Special Sensor Ultraviolet Limb Imager (SSULI) will provide accurate measurements of the upper atmosphere and ionosphere, useful for warfighter applications. The launch improves space weather forecasting, enabling better prediction of signals transmitted or reflected, influencing radar and communication systems.
University of Iowa researchers confirm Voyager 1's entry into interstellar space after detecting electron plasma oscillations at a frequency corresponding to an electron density about 40 times greater than expected. The spacecraft is now the most distant human-made object at over 11.6 billion miles from the sun.
A new model provides an alternative description of atomic-level gold bonding, taking into account bond directionality. The Tersoff potential model allows for reliable covalent bonds between gold atoms and other materials.
Researchers achieve stable, high-energy electron beams by controlling wave velocity and intensity using a two-stage process. This innovation enables compact, cost-effective colliders for fundamental physics and new ultrafast light sources.