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Related Articles from SNS
Influence of DFT Functionals on Low-Energy Electron Scattering Cross Sections of Nitric Oxide
Announce Type: new Abstract: Nitric oxide (NO) is important in biological, atmospheric, plasma, industrial, and astrophysical environments, where reliable electron-collision data support modelling charged-particle interactions with matter. Its well-known experimental properties make it suitable for assessing how the target electronic-structure description affects low-energy electron scattering calculations. In this work, NO properties were evaluated using B3LYP, M06-2X, PBE0, and...
Surface Excitations, Energy Loss, and Decoherence in Electron Interferometry
Announce Type: new Abstract: We develop a mode-resolved description of decoherence in split-beam electron interferometry near dielectric surfaces, and show how it connects to models from electron energy-loss spectroscopy (EELS). The central result is that the decoherence rate is a weighted integral over the differential EELS spectrum, with a factor $1-\cos(k_x d)$ encoding the path distinguishability of the two electron trajectories. Incorporating retardation and thermal occupation...
Ab Initio Free Energy Surfaces for Coupled Ion-Electron Transfer
arXiv:2510.19106v5 Announce Type: replace Abstract: Although coupled ion-electron transfer (CIET) has emerged as a powerful framework to rationalize the kinetics of Faradaic reactions, its mechanism has lacked a fully microscopic, first-principles description. Here we show that the coupling of electron-transfer to ion-transfer can be understood as an extension of Marcus theory in which the ensemble of diabatic nuclear configurations is conditioned on a classical collective variable...
Ab Initio Free Energy Surfaces for Coupled Ion-Electron Transfer
arXiv:2510.19106v4 Announce Type: replace Abstract: Although coupled ion-electron transfer (CIET) has emerged as a powerful framework to rationalize the kinetics of Faradaic reactions, its mechanism has lacked a fully microscopic, first-principles description. Here we show that the coupling of electron-transfer to ion-transfer can be understood as an extension of Marcus theory in which the ensemble of diabatic nuclear configurations is conditioned on a classical collective variable...
Design and electron optics performance of a MEMS electrostatic electron monochromator
arXiv:2606.09423v1 Announce Type: new Abstract: Monochromators are routinely used in Transmission Electron Microscopy and Electron Energy Loss Spectroscopy, to improve both spatial and energy resolution. State-of-the-art monochromators, however, are complex instruments that typically require additional electron optical correctors, limiting their implementation to the high-end, most expensive microscopes. Miniaturized monochromation relying on purely electrostatic fringe fields has recently...
Loss of PSAE redirects PGRL1 to photosystem I and enhances PGR5-dependent cyclic electron transfer in Arabidopsis
Electrons energised by light energy at photosystem I (PSI) primarily enter the linear photosynthetic electron transfer (LET) or cyclic electron transfer (CET) pathway. The balance between LET and CET activity is a crucial factor in the regulation of photosynthesis, since CET increases the stoichiometry of proton to electron transfer. The additional transmembrane proton gradient ({Delta}pH) triggers feedback control of light harvesting and electron transfer photoprotection via...
Plasma wakefield dynamics of self-generated electron bunch trains
Announce Type: new Abstract: Laser plasma accelerators can deliver high-energy, quasi-monoenergetic electron beams over centimeter-scale distances. In this work, we report on the generation of narrow, quasi-monoenergetic electron bunch trains with periodic energy spacing issued from downramp injection in a laser driven wakefield accelerator. The periodicity in energy is shaped via relativistic lengthening of the wakefield during the acceleration phase, while the spatial periodicity is...
Exploring Converter Control Duality in Microgrids: AC Grid-Forming vs DC Droop Control
Announce Type: replace Abstract: Power electronic converters are fundamental building blocks of both AC and DC microgrids, enabling the integration of renewable energy sources, energy storage systems, electronic loads, and electric vehicles. In contrast, converter control in DC microgrids has developed along the path of droop control, which is widely adopted for decentralized DC-bus voltage regulation and power sharing. Although these control strategies share certain characteristics, their...
Variational low-energy subspaces for chemically accurate excited states
Announce Type: new Abstract: Accurate electronic excited states are essential for photochemistry, spectroscopy and non-adiabatic molecular dynamics, but high-level calculations often scale steeply and require prior knowledge of the target state's character or symmetry. Here we show that variational excited-state optimization can be reformulated as an iterated ground-state-like problem for a low-energy subspace of the electronic Hamiltonian. Applying this variational principle to...
Diamond quantum sensor could reveal elusive altermagnets
The article discusses the discovery of altermagnets, a third category of magnets that could potentially combine the best qualities of ferromagnets and antiferromagnets. Altermagnets are being studied for their technological potential, particularly in creating faster and more energy-efficient electronics. The article highlights the significance of this discovery and its potential impact on the field of electronics.