Research & science

Research & science Saturation-Aware Robust Trajectory Optimization for Reusable Launch Vehicles via Differentiable Physics arXiv:2607.09736v1 Announce Type: cross Abstract: The high-angle-of-attack flip maneuver of reusable launch vehicles presents significant challenges for robust trajectory optimization due to the combined effects of highly nonlinear dynamics, aerodynamic uncertainties, and actuator saturation. This paper presents a differentiable physics framework for saturation-aware robust trajectory optimizat… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Photonic Theta Cavity: Engineering Bound States in the Continuum in Topological Resonators Beyond the Limitations of Near Field Coupling arXiv:2607.09915v1 Announce Type: cross Abstract: The Theta Cavity is a unique topological resonator architecture which utilizes interferometric coupling to overcome fundamental design limitations associated with near-field evanescent coupling which currently dominates the design space for integrated photonics. The defining device physics is established by the mirror symmetric cross junctions w… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Differentiable Fast Far-Field Transform in Cylindrical Coordinates for Large-Area Cascaded Metalens Optics arXiv:2607.10005v1 Announce Type: cross Abstract: We present a fully differentiable far-field transform in cylindrical coordinates for full-area point spread function (PSF) evaluation and optimization of large axisymmetric metalenses. The method computes wave-optical responses of apertures spanning thousands to tens of thousands of wavelengths in diameter (millimeter scales in the visible, cent… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Non-Reciprocal Dynamic Metasurface Antenna: Practical Multiport-Network Modeling and Optimization for Multi-User Interference Resilience arXiv:2607.10363v1 Announce Type: cross Abstract: Channel reciprocity fundamentally limits full-duplex (FD) base stations due to multi-user co-channel interference. We examine the potential of deploying a non-reciprocal dynamic metasurface antenna (NR-DMA) at the base station to overcome this limitation. Our NR-DMA architecture connects a single circulator to three feed ports of a multi-feed DM… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Electrohydrodynamic wind generation in planar DBDs: role of electrode symmetry and geometry arXiv:2607.10670v1 Announce Type: cross Abstract: This study experimentally and numerically investigates the electrohydrodynamic (EHD) interaction produced by a surface dielectric barrier discharge (SDBD) plasma actuator at atmospheric pressure. The non-thermal dielectric barrier discharge generates ionic wind, which is characterized using a symmetric annular actuator composed of concentric rin… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Optical Kerr nonlinearity enhancement in high-index metasurfaces via Mie void lattices arXiv:2607.10719v1 Announce Type: cross Abstract: Recently, research in nanophotonics has turned toward Mie resonances in voids on the surface of high-refractive-index materials. The optical Kerr effect (OKE) in high-index membrane metasurfaces with Mie void lattices is investigated using three-dimensional finite-difference time-domain (FDTD) simulations, with gallium phosphide (GaP) as a model… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Model-Free Detection and Accommodation of Sensor Faults for a PEM Electrolyzer arXiv:2607.10883v1 Announce Type: cross Abstract: We investigate the detection and accommodation of sensor faults for a proton exchange membrane electrolyzer coupled to a DC/DC converter powered by renewable energy sources. The proposed method for detecting and accommodating the sensor fault is model-free and is based on the concept of ultra-local model that is becoming classic in control engin… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science High-Quality Ge-Doped (010) $\beta$-Ga$_2$O$_3$ Homoepitaxial Films Grown by Low-pressure CVD: Structural, Electrical, and Schottky Diode Characteristics arXiv:2607.10907v1 Announce Type: cross Abstract: In this work, Ge-doped $\beta$-Ga$_2$O$_3$ homoepitaxial films were grown on native (010) $\beta$-Ga$_2$O$_3$ substrates using low-pressure chemical vapor deposition (LPCVD). Controlled $n$-type doping was achieved with room-temperature carrier concentrations ranging from $7.4\times10^{17}$ to $2.57\times10^{18}\ \mathrm{cm}^{-3}$ and correspond… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science High-Mobility Ge-Doped $\beta$-Ga$_2$O$_3$ Growth on Sapphire by Low-Pressure Chemical Vapor Deposition arXiv:2607.10908v1 Announce Type: cross Abstract: In this work, high-quality Ge-doped (-201) $\beta$-Ga$_2$O$_3$ thin films were heteroepitaxially grown on c-plane sapphire substrates with offcut angles of 0 deg, 2 deg, 6 deg, and 8 deg using low-pressure chemical vapor deposition (LPCVD). Increasing sapphire offcut promoted step-flow growth, resulting in improved terrace alignment, reduced sur… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Telecom-band Chiral Light Detection through Hidden Giant Third-Order Nonlinear Circular Dichroism in Two-dimensional Halide Perovskite arXiv:2607.11037v1 Announce Type: cross Abstract: Chiral nonlinear optical (NLO) responses enable efficient discrimination of circularly polarized light (CPL) and are attracting increasing interest for optical and optoelectronic technologies. However, studies on NLO properties in chiral materials have largely focused on second-order NLO processes, while the role of chirality in third-order NLO … arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Anomalous Transverse Response and Multi-Field Ferrialtermagnetic-Ferroelectric Valve with CrSb Flakes arXiv:2607.11222v1 Announce Type: cross Abstract: Altermagnets combine the zero-stray-field of antiferromagnets with the spin polarization of ferromagnets, showing great potential for spintronic applications. Here, we propose ferrialtermagnetism as a distinct subclass of altermagnetic family, where symmetry-inequivalent altermagnetic sublattices possess nonidentical Neel vectors, preventing mut… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science A Nearable Soft Mat Based on Distributed Optical Fiber Sensing for Physiological Monitoring arXiv:2607.11255v1 Announce Type: cross Abstract: Distributed optical fiber sensing (DOFS) combines the advantages of fiber optic sensors, including flexibility, small size, immunity to electromagnetic interference, and high metrological performance, with the capability to transform a single optical fiber into a continuous sensing element for spatially resolved mechanical measurements. Optical … arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Controlling the Inhomogeneous Broadening and Impedance Matching of a Spin Ensemble arXiv:2607.11315v1 Announce Type: cross Abstract: We control the spectral distribution of a spin ensemble by applying a magnetic field gradient using an anti-Helmholtz coil inside a dilution refrigerator, and demonstrate impedance matching between the ensemble and a transmission line, achieving -50 dB absorption of incident radiation. This represents a first step toward a spin-ensemble-based qu… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Heterogeneous-Gradient Phase--Polarization Alignment and Maximal-Ratio Weight Allocation for Multi-Aperture Coherent FSO Reception arXiv:2607.11458v1 Announce Type: cross Abstract: Multi-aperture coherent reception can improve freespace optical (FSO) links by converting spatial diversity into coherent combining gain. In turbulent links, the aperture branches are simultaneously affected by relative phase errors, polarization mismatch, and unequal signal-to-noise ratios (SNRs). Existing methods treat phase/polarization align… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Spacer-Mediated Gold Nanocube Arrays for Edge-Localized Excitonic Enhancement in Monolayer MoS2 arXiv:2607.11768v1 Announce Type: cross Abstract: Plasmonic nanostructures offer an effective route for enhancing light-matter interaction in atomically thin semiconductors, whose optical response is intrinsically limited by their sub-nanometer active thickness. Here, we numerically investigate excitonic enhancement in monolayer (ML) Molybdenum Disulfide (MoS2) coupled to size-tuned gold (Au) n… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Slow is fast: raising barriers to accelerate thermal relaxation arXiv:2607.11877v1 Announce Type: cross Abstract: For a reversible system relaxing to equilibrium, the obvious fastest strategy is to lower all kinetic barriers (open all gates). We find that such intuition holds at three levels: the all-open-gate strategy achieves the highest local conductance, it maximizes the instantaneous speed of approach in every $f$-divergence, and it simultaneously maxi… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Tracing boron diffusion into a textured silicon solar cell using electron beam induced current in a scanning transmission electron microscope arXiv:2109.00586v2 Announce Type: replace Abstract: The light absorption of [001] grown single-crystalline silicon wafers can be enhanced by chemical etching, e.g., with potassium hydroxide, resulting in a pyramid-like surface texture. Alongside advantageous photon harvesting in solar cells, the surface roughness leads to drawbacks when measuring diffusion behaviour of dopants in the heterogene… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Capturing Finite Target Dynamics: Phase-Delayed Analytic Modeling of Multi-Layer Penetration Events arXiv:2508.16583v2 Announce Type: replace Abstract: The Walker-Anderson half-space penetration model has been successfully used for the rapid, efficient calculation of penetration of walls by rigid and eroding rods. These models align well with detailed simulations for thick targets; however, existing extensions for finite targets struggle to accurately capture nose-tail velocity profiles in th… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Tailoring multiple scattering acoustic media with perfect transmission for non-Abelian braiding and beyond arXiv:2602.15366v2 Announce Type: replace Abstract: Multiple scattering of waves in complex media can be harnessed and tailored for diverse phenomena in sound and light. Despite the tremendous progress enabled by technologies such as time-reversal propagation and wavefront shaping, the full control of transmission matrix remains a significant challenge. In this work, we propose a multi-scatteri… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science On the multi-frequency electromagnetic emission from a rotating charged dielectric disk made of isotropic media: -a verification of Maxwell's equations for a mechano-driven medium system arXiv:2606.03105v2 Announce Type: replace Abstract: The electromagnetic behavior of a uniformly moving medium has been traditionally described by the Minkowski's theory, based on which the electromagnetic (EM) emission from a rotating isotropic medium should be linear with the rotation frequency, which means that the frequency of the EM emission should be the same as that of the excitation sour… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science NSF Future Manufacturing Data Challenge: A Multimodal DED Dataset for Probabilistic Representation and Prediction of Laser-Track Geometry arXiv:2607.07965v2 Announce Type: replace Abstract: We introduce a multimodal directed energy deposition (DED) dataset for predicting the probabilistic local geometric variation of single laser tracks produced on stainless-steel 316L substrates. The dataset supports the NSF Future Manufacturing Data Challenge and contains three complementary modalities: in-situ thermal image sequences from a St… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science The light carrying orbital angular momentum through time-varying scattering media using dual orthogonal-polarization channels arXiv:2605.05230v2 Announce Type: replace-cross Abstract: Orbital angular momentum (OAM) of light can be used as a degree of freedom for optical communication. However, the reliable transmission of OAM beams through time-varying scattering media remains challenging. In this paper, we report an approach for OAM transmission through time-varying scattering media using dual orthogonal-polarization… arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science Collisions and Stopping of Fast Charged Particles in Matter arXiv:2606.25847v3 Announce Type: replace-cross Abstract: This text is intended to offer a consistent presentation of the theory of collisions and stopping of charged particles in matter, limited to the range of intermediate kinetic energies where atomic aggregation effects are relatively unimportant and processes such as the creation of particle-antiparticle pairs are not likely to occur. The … arXiv — physics.app-ph (Applied Physics preprints) · 14 Jul 2026 Research & science SlaKoNet-VQD: A universal Slater-Koster tight-binding Hamiltonian for variational quantum band-structure calculations on near-term hardware arXiv:2607.09761v1 Announce Type: new Abstract: Variational quantum algorithms such as VQE and VQD are promising for near-term electronic structure calculations, but for periodic solids their reach is limited by the cost of building a faithful second-quantized Hamiltonian, typically via DFT plus Wannierization or hand-fit tight-binding parameters. SlaKoNet addresses this by combining deep learn… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science Approximate explicit formulas for Stoner-Wohlfarth hysteresis loops arXiv:2607.09881v1 Announce Type: new Abstract: Approximate explicit formulas for the hysteresis loops in the Stoner-Wohlfarth model are derived. We consider the hysteresis loops both for a single particle with a fixed easy-axis direction and for an ensemble of particles with randomly oriented anisotropy axes. The physical assumption used to derive the formulas is that the particle magnetic mom… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science Bragg Interferometry of Moir\'e Superlattices: From Geometric Phase Principles to Atomic Reconstruction arXiv:2607.09901v1 Announce Type: new Abstract: The emergence of moir\'e superlattices formed by twisting and stacking two-dimensional materials has created a need for characterization techniques capable of mapping sub-angstrom atomic reconstruction across micron-scale fields of view. This review surveys a suite of methodologies developed to extract geometric phases in electron microscopy and X… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science The Precursor Genome: A Pairwise Reaction Dataset for Solid-State Synthesis arXiv:2607.09903v1 Announce Type: new Abstract: Solid-state reactions remain the dominant route to inorganic materials, yet no large, machine-readable dataset reports their experimental protocols and outcomes with consistent provenance; this gap obstructs first-principles, data-driven, and machine-learning approaches to synthesis science. Here, we present the Precursor Genome, a dataset of 1,03… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science Auditing Machine-Learning Models and Their Training Data with Explainability and First-Principles Verification: Application to Spin Hall Conductivity arXiv:2607.09910v1 Announce Type: new Abstract: Machine-learning models for materials properties rest on two assumptions that standard validation never tests: that a model's features reflect the physics of the property rather than accidents of the training distribution, and that the training labels are themselves correct. We introduce a model-agnostic audit protocol for both, combining SHAP att… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science Improved Heat Dissipation in CsPbBr${_3}$-hBN Heterostructures arXiv:2607.09914v1 Announce Type: new Abstract: Metal halide perovskite semiconductors are promising materials for optoelectronic and photonic devices, including solar cells and next-generation coherent light sources. However, their low thermal conductivity limits the practical operation of devices under high excitation levels. Integrating thermally conductive, large band-gap two-dimensional (2… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science Thermodynamics of hydride formation: Anisotropic size-dependent coupled chemo-thermo-mechanical effects at Ni/NiH interfaces arXiv:2607.09977v1 Announce Type: new Abstract: Ni nanoparticles are frequently used as catalysts for hydrogenation reactions as well as in hydrogen storage applications. Recently, we have shown that small Ni nanoparticles can absorb hydrogen at < 10 bar pressure to form Ni hydride. During this process, the hydride growth is anisotropic, and a coherent Ni/NiH interface is formed. In order to ex… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science Anisotropic representations for E(3)-equivariant machine learning coarse-grained potentials arXiv:2607.10002v1 Announce Type: new Abstract: Coarse-graining (CG) lowers the computational cost of atomistic simulations by representing groups of atoms as effective interaction sites, reducing the degrees of freedom of the system but often compromising structural fidelity or requiring system-specific parameterization. Here, we introduce a novel anisotropic machine learning CG potential that… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science Probing the Nature of Interstitial Anionic Electrons in 2D Electride Ca$_2$N via Landau-Level Spectroscopy arXiv:2607.10024v1 Announce Type: new Abstract: We investigate the magnetic-field response of interstitial anionic electrons (IAEs) in two-dimensional electrides, using monolayer Ca$_2$N as a prototypical system. By computing the Landau-level (LL) spectrum of the electride bands forming the Fermi surface, we find a linear LL evolution with magnetic field that closely resembles the behavior of a… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science Alloy engineering of Magnetic phases in two-dimensional Chromium Trihalides arXiv:2607.10030v1 Announce Type: new Abstract: Two-dimensional magnetic materials offer unique opportunities for exploring low-dimensional spin phenomena and next-generation spintronic devices. Chromium trihalides CrX3 (X = Cl, Br, I) belong to an important family of these materials, where alloying opens pathways for tailoring their electronic, magnetic, optical properties, and thermodynamic s… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science Flux Jamming and Bimodal Dynamics in Bounded Spin Networks arXiv:2607.10045v1 Announce Type: new Abstract: We present a quantitative framework for predicting how kinetic barriers governing temperature dependent relaxation arise in finite square magnetic networks. By formulating a series of non homogeneous transfer matrices from the adjacency spectrum of the underlying graph, we show how local coordination shapes the energy landscape and identifies geom… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science Engineering Topology by Design in Two-dimensional Materials arXiv:2607.10049v1 Announce Type: new Abstract: Two-dimensional topological insulators (2D TIs) have emerged as a cornerstone of next-generation spintronic technologies due to their robust, dissipationless edge states protected by time-reversal symmetry. Initial realizations of 2D TIs have primarily focused on materials with strong intrinsic spin-orbit coupling capable of driving band inversion… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science Polarization Rotation Drives a Spin-Topological Transition in Ferroelectric Bismuth Monolayer arXiv:2607.10063v1 Announce Type: new Abstract: Bismuth monolayer is the first two-dimensional elemental ferroelectric and an appealing platform for coupling polar order to spin-orbit-driven topology. However, its microscopic switching mechanism remains elusive. Here, using first-principles lattice dynamics and symmetry-adapted mode analysis, we identify a previously overlooked rotational pathw… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science Dynamical Nonrelativistic Spin Splitting via THz Nonlinear Phononics arXiv:2607.10091v1 Announce Type: new Abstract: Nonrelativistic spin splitting (NRSS) in collinear antiferromagnets offers a route to high-frequency spintronics immune to stray fields, but its dynamic control has remained elusive. We demonstrate, using density functional theory (DFT) and nonlinear phononics, that THz laser pulses can achieve ultrafast, reversible control of NRSS on picosecond t… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science Correlated Plasmonic Excitation in Twisted Nematic Plasmonic Superlattices arXiv:2607.10122v1 Announce Type: new Abstract: Superlattices with twisted configurations, such as moire lattices, have recently been extensively exploited for their unique electronic, magnetic, and optical properties. One remarkable feature of nanoscale twisted superlattices is the distinct lattice symmetries and the continuous phase transitions between periodic or aperiodic phases, representi… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science Chiral charge density waves in transition metal dichalcogenide arXiv:2607.10182v1 Announce Type: new Abstract: The emergence of chirality in the charge density wave (CDW) phase of 1$T$-TiSe$_2$ has recently attracted significant attention, yet its microscopic origin remains debated. The prevailing interpretation attributes chirality to a relative phase shift between the charge density components. Here, using density functional theory and symmetry analysis,… arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026 Research & science Self-Consistent Phonon Spectral Functions and Thermal Transport Beyond the Quasiparticle Approximation arXiv:2607.10211v1 Announce Type: new Abstract: Anharmonic lattice dynamics shapes phonon spectra and thermal transport, yet first-principles linewidth calculations typically assume phonon quasiparticles with sharply defined frequencies. Here, we introduce a self-consistent spectral function framework that represents each phonon by its full frequency distribution and uses the resulting spectra … arXiv — cond-mat.mtrl-sci (Materials Science preprints) · 14 Jul 2026