Letters in 2023

Oxidation normally deteriorates the mechanical properties of metals. But it is now shown that the formation of a percolating oxide network in metallic glass nanotubes can result in an unprecedented superelasticity of 14% at room temperature.

Proximity-induced chiral quantum emission is generated by applying nanoindentation on monolayer WSe₂ on an antiferromagnetic van der Waals material (NiPS₃) at zero external magnetic fields, reporting a degree of circular polarization of 0.89 and a single-photon purity of 95%.

The authors report subatomic precision in measuring the displacement of a nanowire. Such precision is achieved by employing deep-learning enabled analysis of single-shot scattering of topologically structured superoscillatory illumination.

Using direct laser writing with a nanosecond pulsed laser operating at above-bandgap photon energies, we demonstrate the selective formation of spin defects in photonic crystal cavities in 4H-silicon carbide and their in situ characterization.

Understanding lithium dynamics in solid-state electrolytes used for Li-ion batteries can be challenging. Using nonlinear extreme-ultraviolet spectroscopies, a direct spectral signature of surface lithium ions showing a distinct blueshift relative to the bulk absorption spectra is observed in a prototypical solid-state electrolyte.

We report compact spin-valley-locked perovskite emitting metasurfaces where spin-dependent geometric phases are imparted into bound states in the continuum via Brillouin zone folding, simultaneously enabling chiral purity, directionality and large emission angles.

Employing an oxidation-activated charge transfer strategy to oxidize transition-metal dichalcogenides into transition-metal oxides, the authors imprint plasmonic cavities with laterally abrupt doping profiles and nanoscale precision demonstrating plasmonic whispering-gallery resonators.

We report the observation of narrowband terahertz emission from a quasi-one-dimensional charge-density-wave insulator, (TaSe₄)₂I. The origin of the emitted radiation is interpreted as a phason that obtains mass due to the long-range Coulomb interaction.

Large-size single-crystal van der Waals layered Bi₂SeO₅ has been synthesized with a high dielectric constant and high breakdown field strength for two-dimensional electronics applications.

The authors present scanning tunnelling spectroscopy data that show that the mechanism of superconductivity in overdoped cuprate superconductors is qualitatively different from conventional mean-field theory.

Cubic materials such as GeTe have low lattice thermal conductivity, thought to arise from a non-cubic local structural transition. Here, using a variable-shutter pair distribution function method, the average structure is shown to be crystalline but with anisotropic dynamics at higher temperatures.

This work reports on the synthesis and proximity-induced superconductivity in a topological insulator-based, thin-film heterostructure towards the development of a scalable material platform that could potentially support robust quantum computing.

Molecular graphene nanoribbons hold promise for quantum experiments in single-electron transistors but require improvements in their debundling. Here, the authors demonstrate ultra-clean transport devices by enhancing nanoribbon solubility via bulky groups on the nanoribbon edges.

The realization of strongly correlated bosons in a solid-state lattice is challenging. Here, the authors trap interlayer excitons in an angle-aligned WS₂/bilayer WSe₂/WS₂ multilayer moiré lattice and observe correlated insulating states.