Recycling news & research

Research & science Sky-blue Solution-processed TADF and Hyperfluorescent OLEDs via a High-Work-Function PEDOT:PSS:PFI Hole Injection Layer arXiv:2607.18474v1 Announce Type: new Abstract: Solution-processed OLEDs offer a scalable route to large-area devices, but achieving competitive efficiency in multilayer stacks remains a challenge due to difficulties in hole injection as well as solvent orthogonality between layers. A hole injection layer (HIL) based on a blend of PEDOT:PSS and a perfluorinated ionomer (PFI) addresses both chal… arXiv — physics.app-ph (Applied Physics preprints) · 22 Jul 2026 Research & science Evaluation-Recording Contamination in Learned Nano-Quadrotor Dynamics: A Fresh-Seed Audit arXiv:2607.18482v1 Announce Type: new Abstract: Learned flight-dynamics models are often trained on short windows extracted from longer recordings. Randomly splitting these windows can place dependent samples from the same physical flight in both training and evaluation sets. We audit this issue using a fixed snapshot of the NanoBench Crazyflie 2.1 dataset. The experiment holds evaluation fligh… arXiv — physics.app-ph (Applied Physics preprints) · 22 Jul 2026 Research & science Switchable selective backscatter modulation via the Kerker effect arXiv:2607.18900v1 Announce Type: new Abstract: We design a reflective scatterer that operates only in the backscatter direction using modulation of the Kerker effect. This being a phenomena where the resonant modes of a scattering object produce total destructive interference in the backscatter direction. Our design consists of a dielectric shell and an interior metal element that provide the … arXiv — physics.app-ph (Applied Physics preprints) · 22 Jul 2026 Research & science Ambient Pressure-Driven Actuators and Shape-Morphing Metamaterials arXiv:2607.18982v1 Announce Type: new Abstract: Actuators which change shape in response to ambient pressure have great potential for use in extreme environments, from space to the deep ocean. Bi-layer actuators have so far not been explored to this end, despite their lightness and mechanical simplicity (there is no requirement for a separate power source or pump, for example) making them ideal… arXiv — physics.app-ph (Applied Physics preprints) · 22 Jul 2026 Research & science The Butterfly Defect Effect in Cylindrical Shell Buckling: Non-localized Interactions of Localized Imperfections arXiv:2607.19245v1 Announce Type: new Abstract: We investigate the buckling of axially compressed cylindrical shells containing localized defects, focusing on interactions among multiple defects and between them and the shell edges. Using high-fidelity finite-element simulations, we first characterize the parameter space of single-dimple sensitivity, defect-edge coupling, and pairwise defect-de… arXiv — physics.app-ph (Applied Physics preprints) · 22 Jul 2026 Research & science Double anticrossings induced by nonlinear magnon interactions arXiv:2607.18807v1 Announce Type: cross Abstract: We observe pump-induced double anticrossings whose gap sizes and center-frequency shifts depend strongly on pump power, indicating a nonlinear mechanism. The anticrossings vanish at high magnetic fields, where energy conservation suppresses three-magnon splitting, thereby identifying the underlying process as three-magnon scattering. We attribut… arXiv — physics.app-ph (Applied Physics preprints) · 22 Jul 2026 Research & science Fast reconstruction of tensor tomographic X-ray scattering data for real-time applications arXiv:2607.19124v1 Announce Type: cross Abstract: X-ray scattering tensor tomography reveals nanoscale structural orientation in 3D, but its reliance on slow iterative reconstruction limits real-time use. We introduce an extension of a direct reconstruction approach for parallel-beam geometries that computes algebraic filters approximating multiple iterative updates with a single filtering and … arXiv — physics.app-ph (Applied Physics preprints) · 22 Jul 2026 Research & science Direct Spatiotemporal Imaging of Charge Carrier Dynamics in Operative Semiconductor Devices arXiv:2607.19157v1 Announce Type: cross Abstract: Understanding charge carrier dynamics within electronic devices is crucial, as it governs both the internal evolution of signals and the externally measurable current. Yet, direct imaging of these dynamics remains elusive: existing approaches are often indirect or inherently perturbative. Here, we introduce Carrier Dynamics by Pockels Imaging (C… arXiv — physics.app-ph (Applied Physics preprints) · 22 Jul 2026 Research & science Towards a universal model for spin-orbit coupled Wannier Hamiltonians arXiv:2607.18403v1 Announce Type: new Abstract: While machine learning interatomic potentials (MLiPs) have matured to revolutionize material science, deep learning models for electronic structure are just beginning to emerge and restricted, almost exclusively, to non-orthogonal basis Hamiltonians. We introduce G(Wa)NN, the first deep-learning model capable of generating the electronic Hamiltoni… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Electron escape probability in high-efficiency photocathodes measured by reverse-injection photovoltage arXiv:2607.18420v1 Announce Type: new Abstract: The characterization of electron transfer through the emitting surface is of crucial importance for optimizing existing and developing new photocathodes. Here we propose and develop a method for the direct determination of the electron escape probability in high-efficiency semiconductor photocathodes. The proposed method is based on the variations… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Long Non-Exponential PL Decay from Localized Defect States in Monolayer WSe$_2$ at Low Temperature arXiv:2607.18423v1 Announce Type: new Abstract: We investigate the recombination dynamics of localized defect emission in monolayer WSe$_2$ using time-resolved photoluminescence over the temperature range from 4 to 120 K. The defect emission comprises a dominant sub-nanosecond exponential component and two weak, long-lived power-law channels extending from a few nanoseconds to several hundred n… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Vacancy Diffusion Across FeCrAl Alloy Composition Space for Accident-Tolerant Fuel Cladding arXiv:2607.18472v1 Announce Type: new Abstract: Iron-chromium-aluminium (FeCrAl) alloys are leading candidates for accident-tolerant fuel cladding in light-water reactors, where their superior high-temperature oxidation resistance promises to extend coping times during loss-of-coolant accidents. The in-reactor lifetime of cladding is ultimately governed by radiation-induced microstructural evol… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Data-Efficient Training of Linear ACE Potentials through Leverage-Guided Subset Selection of ASSYST Structure Pools arXiv:2607.18524v1 Announce Type: new Abstract: The construction of machine-learned interatomic potentials (MLIPs) is often limited by the cost of generating large density-functional-theory (DFT) training datasets. For systematically generated structure pools such as ASSYST, a central practical question is how many configurations must be labeled to achieve reliable accuracy. Here we assess geom… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Battery Material Comparisons Should Refocus on Diffusivity with Best Practices arXiv:2607.18590v1 Announce Type: new Abstract: The continuous demand for improved batteries motivates the discovery and advancement of materials with improved transport. Ionic diffusivity is the relevant material property where its measurement depends on accurate assessment of the active material length-scale, generally from the mass-specific surface area. In this perspective, we argue for ren… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science GQD-AdsNet: Graph Neural Networks Unlock Rapid Exploration of Transition Metal Adsorption on Graphene Quantum Dots arXiv:2607.18591v1 Announce Type: new Abstract: In recent years, interest in single-atom catalysts supported on carbon-based structures has grown considerably due to their high catalytic activity and efficient uses of metal atoms. However, the design and characterization of these materials through first-principles calculations are computationally expensive, limiting the exploration of a large n… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Data-driven Design of Metal-Organic Frameworks with Tunable Negative Thermal Expansion arXiv:2607.18594v1 Announce Type: new Abstract: Materials with negative thermal expansion (NTE) are essential for applications requiring precise control of thermal expansion. Owing to their exceptional chemical tunability, flexible architectures, and low-energy lattice vibrations, metal-organic frameworks (MOFs) represent a rich platform for exploring NTE. However, uncovering the structural mot… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Alchemical thermodynamic integration for ab initio free-energy calculations in solutions arXiv:2607.18750v1 Announce Type: new Abstract: We develop an alchemical thermodynamic integration scheme that couples ab initio force calculators on the fly during Monte Carlo and molecular dynamics simulations. The implementation is validated against existing hybrid-Hamiltonian approaches. The scheme yields ab initio free energies of high-pressure Fe-Ni and ambient Li-Na liquid solutions that… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Phase equilibria in MnSb2Te4-GeSb2Te4 system and magnetic properties of Mn1-xGexSb2Te4 solid solutions arXiv:2607.18925v1 Announce Type: new Abstract: As a sister compound of the antiferromagnetic topological insulator MnBi2Te4, MnSb2Te4 is also a candidate for exotic magnetic topological phases. On the other hand, the structurally analogous but nonmagnetic phase-change material GeSb2Te4 is also known to exhibit nontrivial band topology. Motivated by their shared crystal structure, the similar i… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Stereochemical Vacuum Gap Explains Out-of-Plane Thermal Insulation in MXenes arXiv:2607.18963v1 Announce Type: new Abstract: Two-dimensional MXenes are promising materials for thermal management and spectral camouflage, combining low out-of-plane thermal conductivity with low infrared emissivity and mechanical robustness. Yet the near-order-of-magnitude spread in experimental out-of-plane thermal conductivity measurements (0.14-0.8 W/mK) and the systematic overestimatio… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Sixteen-State Energy Mapping for First-Principles Four-Spin Ring Exchange: Validation on $La_2CuO_4$ and $SrFeO_2$ arXiv:2607.18986v1 Announce Type: new Abstract: Four-spin ring (cyclic) exchange $J_{ring}$ is an essential ingredient of the Heisenberg spin Hamiltonian of cuprates and other square-lattice magnets, yet it has lacked the kind of direct, local first-principles extraction that the four-state method provides for bilinear exchange, $J$. We supply it by generalizing that method to a sixteen-state (… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Deciphering Mechanoluminescence: How the Nature of Mechanical Stress and Structural Dimensionality Shape Mechanisms and Responses arXiv:2607.19003v1 Announce Type: new Abstract: Mechanoluminescent materials exhibit a broad spectrum of controllable light-emission responses to mechanical stimuli of varying types and magnitudes. Yet progress toward high-performance systems remains constrained by an incomplete and often contradictory mechanistic understanding. Here, density functional theory (DFT) calculations optimized for t… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Doping tunable charge density waves in misfit layer compounds arXiv:2607.19095v1 Announce Type: new Abstract: The ability to tune charge density waves (CDWs) through external control knobs, such as doping, pressure or strain is crucial for exploring the phase diagram of two dimensional (2D) or quasi-2D materials. Yet, controlling CDWs critical temperature and ordering vector remains a challenge for current experimental techniques. In this work, we establi… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Thermal and electrical conductivity of a refractory high-entropy alloy after high-pressure torsion: Electron versus phonon contributions arXiv:2607.19123v1 Announce Type: new Abstract: The equiatomic refractory high-entropy alloy TiZrHfNbTa was processed by high-pressure torsion (HPT) to investigate the effect of nanostructuring and defect engineering on thermal and electrical transport properties. Severe plastic deformation (SPD) via the HPT treatment induces substantial accumulation of dislocations, grain refinement to the nan… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science ATLAS: A Foundation Neural Sampler for Amorphous Materials arXiv:2607.19198v1 Announce Type: new Abstract: Amorphous materials exhibit exceptional mechanical and functional properties, yet their rugged energy landscapes are notoriously difficult to sample. Below the glass-transition temperature, conventional molecular dynamics and Monte Carlo become inefficient because equilibration relies on rare barrier-crossing events, while data-driven generative m… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Spatially resolved in-situ characterisation of competing martensitic transformation pathways during nanoscratch in 316H Stainless Steel arXiv:2607.19239v1 Announce Type: new Abstract: Localised surface deformation beneath frictional contacts generates a tribolayer whose microstructure and properties differ from the bulk. In austenitic stainless steels, this tribolayer forms through two competing martensitic transformation pathways. Here, these pathways are isolated in 316H stainless steel using in-situ synchrotron X-ray nanodif… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Time-resolved ARPES in pumped excitonic systems: Floquet physics induced by excitonic fields arXiv:2607.19242v1 Announce Type: new Abstract: We develop a theoretical framework based on the Dynamical Projective Operatorial Approach (DPOA) to study the time- and angle-resolved photoemission spectroscopy (TR-ARPES) of pumped excitonic systems. Including Coulomb electron-electron interactions at the Hartree-Fock (HF) level, our formalism captures the formation of excitonic bound states und… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Complete Hierarchy of Nonrelativistic Odd-Parity Spin Splitting in Collinear Magnets arXiv:2607.19303v1 Announce Type: new Abstract: Momentum-dependent nonrelativistic spin splitting provides a symmetry fingerprint of collinear magnets and can govern unconventional electronic, magnonic, and transport phenomena. Whereas even-parity $s$-, $d$-, $g$-, and $i$-wave splittings in collinear magnets have been extensively studied, odd-parity counterparts remain unexplored beyond the $p… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Coherent Magnons Driven by Photomodulated Anisotropy in Altermagnetic MnTe arXiv:2607.18421v1 Announce Type: cross Abstract: Manganese telluride ($\text{MnTe}$) has recently emerged as a prototypical $g$-wave altermagnet, providing an ideal platform to investigate the non-equilibrium excitations of altermagnetic order. Here, we report simultaneous spatial mapping of the local equilibrium orientation of the N\'eel vector, $\varphi_L(\mathbf{r})$, alongside the amplitud… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Wave propagation and hybridization of plasmonic modes in Maxwell-Chern-Simons pseudo-electrodynamics arXiv:2607.18520v1 Announce Type: cross Abstract: We investigate the propagation of classical plane waves and surface plasmon-polariton modes within the framework of pseudo-electrodynamics (PED) supplemented by a non-local Chern-Simons (CS) topological term. Starting from the dimensionally reduced action, we derive the decoupled second-order wave equations for the electromagnetic field, and for… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Self-consistent GW theory for superconductivity in SrTiO3 models arXiv:2607.18757v1 Announce Type: cross Abstract: Superconductivity in doped SrTiO$_3$ occurs over a wide range of carrier densities, including those for which the Fermi energy is below the polar longitudinal optical phonon scale. In this regime, the assumptions underpinning conventional implementations of Migdal-Eliashberg theory, including frequency cutoffs at the phonon scale and a Coulomb p… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Multiscale ensemble Monte Carlo of transport and gas sensing in monolayer MoS$_2$ arXiv:2607.18895v1 Announce Type: cross Abstract: Two-dimensional semiconductors, such as monolayer MoS$_2$, combine a technologically useful band gap with an all-surface geometry, making them attractive both as field-effect-transistor channels and as chemically sensitive devices. Predictive device design requires a transport model that is (i) physically grounded rather than empirical, (ii) val… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Bayesian inference of composition-dependent phase diagrams arXiv:2309.01271v2 Announce Type: replace Abstract: Phase diagrams serve as a highly informative tool for materials design, encapsulating information about the phases that a material can manifest under specific conditions. In this work, we develop a method in which Bayesian inference is employed to combine thermodynamic data from molecular dynamics (MD), melting point simulations, and phonon ca… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Trans-scale spin Seebeck effect in nanostructured bulk composites based on magnetic insulator arXiv:2509.08327v3 Announce Type: replace Abstract: The spin Seebeck effect (SSE) enables thermoelectric conversion through thermally generated spin currents in magnetic materials, offering a promising transverse geometry for scalable devices. However, conventional SSE devices are confined to nanoscale thin-film architectures, with significantly restricted output power due to the intrinsic cons… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Dynamics of Long-lived Carriers in Molybdenum Carbide Nanosheets arXiv:2602.04327v2 Announce Type: replace Abstract: Molybdenum carbide (MoC) is a promising candidate for substituting expensive platinum-group metals in many applications owing to its low cost and excellent properties, therefore a comprehensive understanding of its carrier dynamics is demanded for advancing the synthesis strategy and implementation of MoC. In this work, the carrier relaxation … arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science A Magnon-Based Electric Field Controlled Magnetoelectric Device for Energy-Efficient Logic-in-Memory arXiv:2602.14031v2 Announce Type: replace Abstract: We demonstrate a non-volatile magnetoelectric magnonic memory (MEMM) that enables fully electrical write/read via direct magnon-driven sensing in an insulating antiferromagnet. A fabricated SrIrO3/La-BiFeO3/SrIrO3 trilayer exhibits sub-100 ps switching, a remnant polarization of 20 uC/cm2, and a readout voltage contrast close to 1mV between hi… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Asymmetric Antibimerons: Statics and Dynamics arXiv:2410.10557v2 Announce Type: replace-cross Abstract: Nontrivial topological spin textures, such as magnetic skyrmions, are of great interest due to their potential use as information carriers in spintronic memory and logic. Here, we theoretically predict an asymmetric antibimeron (AAB) -- a topological texture in an in-plane magnetized chiral ferromagnet with $D_{2d}$ symmetry, which has y… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Spin injection of exciton-polaritons with halide perovskites at room temperature arXiv:2510.04679v2 Announce Type: replace-cross Abstract: Exciton-polaritons, hybrid photon-exciton quasiparticles, constitute a useful platform for the study of light-matter interaction and nonlinear photonic applications. In this work, we realize a monolithic Tamm-plasmon microcavity embedding a thin film of two-dimensional halide perovskites with a tunable polymer spacer that controls the ex… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Electrostatic-Elastic Softening and Ultraviolet Instability Driven by Non-DLVO Interactions in Charged Colloidal Crystals arXiv:2604.22448v3 Announce Type: replace-cross Abstract: Colloidal crystals permeated by mobile ions exhibit a coupling between electrostatic and elastic degrees of freedom that renormalizes the effective screening length and induces wave-vector-dependent elastic softening. Building on our recently proposed continuum model, we perform a rigorous Gaussian fluctuation analysis to elucidate the s… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Fixed-phase Resonance Tracking for Fast Nonlinear Resonant Ultrasound Spectroscopy arXiv:2604.22889v3 Announce Type: replace-cross Abstract: Nonlinear Resonant Ultrasound Spectroscopy (NRUS) experiments that rely on repeated sampling of resonance curves are inherently sensitive to measurement protocol due to evolution of material parameters caused by fast and slow dynamic effects. We introduce a model-assisted discrete-time resonance tracking method that maintains a system at… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026 Research & science Universal scalings and switching entropy in yield-stress fluids arXiv:2607.11799v2 Announce Type: replace-cross Abstract: Yield-stress fluids transition from solid-like to liquid-like behavior at a critical stress threshold, governing phenomena from industrial processing to geological flows. While predominantly investigated under steady shear, large-amplitude oscillatory tests force these materials to cyclically navigate between arrested and fluidized state… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 22 Jul 2026