511 papers
This paper reports the first demonstration of monolithically integrated 940-nm VCSELs grown by molecular beam epitaxy on Ge(001) substrates, achieving room-temperature continuous-wave lasing with threshold currents below 3 mA through the use of a GaAs-on-Ge virtual substrate and real-time in situ process monitoring.
Using time-resolved x-ray resonant magnetic reflectivity, this study reveals that ultrafast laser excitation induces strong depth-dependent inhomogeneity in Fe thin film magnetization driven by simultaneous local and non-local angular momentum transfer, followed by picosecond-scale relaxation and periodic thickness oscillations caused by laser-induced stresses.
This study employs a multimodal X-ray imaging approach to nondestructively reveal that bio-cemented calcite bonds exhibit anisotropic internal strains and distinct sub-domain structures, which are critical for understanding their mechanical integrity and load transfer capabilities.
This paper proposes a novel Bayesian model calibration framework that integrates discrepancy directly into the simulator via Gaussian processes, challenging the traditional Kennedy and O'Hagan approach by attributing model-form errors to input parameter uncertainty, and demonstrates its effectiveness in calibrating Discrete Dislocation Dynamics models against Molecular Dynamics observations.
The paper introduces RASP, an ab initio simulation package that utilizes an all-state model to accurately predict defect-induced reliability degradation in scaled MOSFETs by systematically accounting for all possible defect configurations and transition pathways in amorphous gate dielectrics.
This paper reports that the antiferromagnet CoTaS exhibits a tunable all-magnetic analogue of multiferroic behavior, where magnetic fields induce strong coupling between coexisting topological scalar spin chirality and nematic order to generate advanced functionalities like a topological Hall state with a large resistance anomaly and nonreciprocal transport.
This study demonstrates through combined DFT modeling and correlative DPC-STEM/EELS experiments that irradiation-induced defects can significantly modulate and even reverse interfacial electric fields in Fe2O3-Cr2O3 oxide heterostructures, offering a pathway to engineer corrosion-resistant materials for extreme environments by controlling the spatial distribution of defects.
This study employs ab initio calculations to reveal that spin-phonon relaxation in Yb(III) molecular qubits is governed by non-trivial, delocalized phonon interactions that defy simple magneto-structural correlations, thereby advocating for predictive first-principles frameworks to guide future chemical design.
This study reports that applying pressure to the quasi-one-dimensional compound CrNbSe induces a reversible, iso-symmetric structural transition driven by continuous bond reorganization, which tunes the material between semiconducting and semimetallic states without breaking crystallographic symmetry.
This study reveals that applying pressure to the antiferromagnetic insulator CaMnSb induces a first-order structural transition with a significant volume collapse, driven by anisotropic Mn-Sb orbital reconfiguration and charge localization, which subsequently stabilizes a distinct incommensurate magnetic order in the high-pressure monoclinic phase.
This paper introduces Proof-Carrying Materials (PCM), a rigorous framework combining adversarial falsification, statistical refinement, and formal Lean 4 certification to overcome the high failure rates of single machine-learned interatomic potentials, thereby significantly improving the reliability and discovery yield of high-throughput materials screening.
This paper presents a novel thermodynamically consistent, mesh-free phase field theory that integrates peridynamics with plasticity and damage mechanics to accurately predict cyclic loading behavior and fracture patterns in quasi-brittle materials.
This paper introduces and theoretically validates "persistent altermagnetic spin polarization" (PASP), a robust, mirror-symmetry-protected collinear spin texture in altermagnetic materials that persists despite spin-orbit coupling and enables switchable, high-efficiency spin-filtering for next-generation all-altermagnetic memory and transistor devices.
By combining mechanical strain with ultrafast laser pulses and x-ray scattering, researchers discovered a hidden polar phase in quantum paraelectric SrTiO3 characterized by nanoscale polarization modulations rather than conventional homogeneous ferroelectricity, offering a new explanation for its unique behavior and highlighting the importance of probing collective excitations at finite momentum.
This study resolves conflicting reports on the anomalous Hall effect in MnTe thin films by demonstrating that surface states, rather than the bulk, dominate the effect and that their sign can be engineered through interface design and crystal termination.
This paper demonstrates that combining time-resolved sensing with maximum likelihood estimation significantly mitigates source shot noise in focused ion beam microscopy, improving imaging accuracy or reducing required ion dose by a factor approximately equal to the secondary electron yield.
First-principles rt-TDDFT calculations on monolayer GeS reveal that Coulomb scattering generates ballistic photocurrents comparable to shift currents, identifying a previously overlooked mechanism for the bulk photovoltaic effect.
This study demonstrates that alloying monolayer MoWSe semiconductors enables the engineering of extremely high excitonic -factors (up to -10) through non-trivial band structure modifications, as confirmed by both magneto-optical spectroscopy and first-principles calculations.
This paper demonstrates that in situ deposited AlO passivation effectively prevents interfacial oxidation in epitaxial tantalum and aluminum films, enabling superconducting microwave resonators to maintain high internal quality factors and exceptional long-term stability over fourteen months of air exposure.
This study demonstrates that the linear and nonlinear optical responses of the magnetic Rashba semiconductor (Ge,Mn)Te in the mid-infrared region are governed by quantum geometric effects, specifically revealing that optical conductivity reflects the quantum metric while magnetic injection current is enhanced by the Fermi level's position relative to the Dirac point.