Los Alamos National Laboratory

Resolving Active-Site Heterogeneity in Fe–N–C Catalysts by Integrated Multimodal Spectroscopy and Simulation

Abstract Fe–N–C single-atom catalysts are among the most promising electrocatalysts for the oxygen reduction reaction (ORR), yet their atomic-scale structure remains difficult to resolve because high-temperature synthesis generates a diverse population of Fe sites. In this work,...

First-Principles Insights into Surface and Ligand Effects in Stoichiometric HgTe Quantum Dots

Abstract HgTe quantum dots are promising colloidal infrared semiconductors for photodetection, imaging, and optoelectronics because their electronic structure can be tuned from the short-wave to mid-infrared. Despite this technological promise, how the electronic structure of ult...

Shear-free, inhomogeneous turbulence in a stably stratified fluid. Part 2. A wave–turbulence decomposition

In Hass & Lele (2026 J. Fluid Mech. 1037, A20), we looked at the statistical structure (self-similarity) and entrainment rate of a shear-free turbulent layer bounded by a net zero momentum source layer above and a stable density interface below and found agreement with oscillatin...

Hyperspectral dual-comb compressive ghost imaging with deep learning reconstruction

Ghost imaging reframes image formation by replacing pixelated sensors with correlation measurements between structured illumination and a single-pixel detector, enabling capabilities that are difficult or impossible for conventional cameras. This powerful technique is inherently...

Influence of Color-Center Electronegativity on Circular Dichroism in Single-Walled Carbon Nanotubes

Abstract Covalently functionalized single-walled carbon nanotubes (SWCNTs) have emerged as attractive quantum photonic materials due to their highly tunable optical properties and efficient single-photon emission capabilities. Recent progress in engineering chiral defects has mot...

Plug-and-Play Image Restoration with Flow Matching: A Continuous Viewpoint

Abstract. Flow matching-based generative models have been integrated into the plug-and-play image restoration framework, and the resulting plug-and-play flow matching (PnP-Flow) model has achieved some remarkable empirical success for image restoration. However, the theoretical u...

Molecular solvent structure, charge regulation, and colloidal interactions in confined electrolyte solutions

Charged surfaces in contact with electrolyte solutions give rise to electric double layers through redistribution of ionic species near the interface. When brought into close proximity, double-layer overlap leads to interactions commonly described using continuum electrostatic mo...

Characterizing the presence of polychlorinated biphenyls within Biota Found in New Mexico

Polychlorinated biphenyls (PCBs) are a group of industrial chemicals that were widely used in the United States before being banned by the Toxic Substances Control Act in 1976. Concerns regarding PCBs arose in the 1960s due to their toxicity, classification as a carcinogenic comp...

Radon-induced backgrounds in the NEXT-100 experiment

A bstract The NEXT-100 detector at the LSC aims at the first competitive search for the 0 νββ decay using a high-pressure 136 Xe electroluminescent time projection chamber. The first low-background run of NEXT-100 at 3.95 bar has been devoted to the measurement of the radon-induc...

Engineering van der Waals heterostructures for dispersion-selective meV-scale quantum sensing

Quantum sensing of meV-scale scattering and absorption of impinging particles with electrons in solid state detectors is a challenging technological advancement with the potential to enable breakthroughs in quantum information applications and studies of fundamental physics. Howe...

The weak shock limit as an organizing boundary in shock response

Materials under shock loading exhibit strengthening in the weak shock region followed by weakening in strong shock, but no general criterion defines this transition. Here, the weak shock limit (WSL) is proposed as a consistent and experimentally accessible boundary in shock respo...

Preconditioning a Hybridizable Discontinuous Galerkin Method for Navier–Stokes at High Reynolds Number

Abstract. We introduce a preconditioner for a hybridizable discontinuous Galerkin discretization of the linearized Navier–Stokes equations at high Reynolds number. The preconditioner is based on an augmented Lagrangian (AL) approach of the full discretization. Unlike standard gra...

Disorder‐Broadened Topological Hall Phase and Anomalous Hall Scaling in FeGe

ABSTRACT Magnetic skyrmions are promising candidates for next‐generation spintronic memory and logic due to their nanoscale size and topological stability. However, skyrmion‐based devices remain limited by narrow operating temperature windows that typically exclude cryogenic regi...

How to train your resistive network: Generalized equilibrium propagation and analytical learning

Machine learning is a powerful method of extracting meaning from data; unfortunately, current digital hardware is extremely energy-intensive. There is interest in an alternative analog computing implementation that could match the performance of traditional machine learning while...

3D seismic imaging of a fracture damage zone controlling reservoir compartmentalization at the Raft River EGS using multi-azimuth walkaway VSP

Accurate imaging of steeply dipping fracture zones in crystalline enhanced geothermal systems (EGS) is critical for constraining permeability architecture and guiding stimulation design. However, such structures remain poorly resolved by conventional surface seismic methods. We p...

Synthesis Notes on Generating Bimetallic 243Am Complexes Using Inherent Lewis Acidity and the TPT Cryptand

Abstract Tris(pyridinediimine)bis(tren) (TPT) was employed as a proligand in reactions with 243Am(NO3)3·nH2O in methanol generating several product types consistent with observations from analogous reactions with the lanthanide series. [Am(TPT)][Am(NO3)6] (1) was identified along...

A Wastewater-basedModeling Framework for InferringNorovirus Transmission Dynamics

Abstract Norovirus is a leading cause of gastroenteritis globally, yet its true infection burden in the community remains poorly understood because of widespread asymptomatic transmission and underreporting. Wastewater-based surveillance is a promising approach for tracking infec...

Convolutional LSTM surrogate for mesoscale hydrocode simulations of granular wave propagation

Granular materials subjected to impact loading exhibit heterogeneous spatiotemporal dynamics governed by stress-wave propagation, pore collapse, and grain-scale rearrangement. Mesoscale hydrocodes can resolve these mechanisms, but the computational cost of repeated simulations li...

Development of Robust Ratio Linear Fitting Method of Temperature and Emissivity Separation for High-Temperature Data

Accurate temperature and emissivity separation from thermal infrared radiance is essential for characterizing materials under high-temperature laboratory conditions. Existing temperature and emissivity separation methods have largely been developed for multispectral remote sensin...

Stellar Interpretation of Meteoritic Data and PLotting for Everyone (SIMPLE): Isotope Mixing Lines for Six Sets of Core-collapse Supernova Models

Abstract Bulk meteorites and their inclusions exhibit, for many chemical elements, isotopic variability produced by nucleosynthetic events in stars and supernovae before the formation of the Sun. While the exact astrophysical origins of these variations are still a matter of deba...