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Multiferroics can possess multiple ferroic orders, for example, electric polarization and magnetism, and are of interest for new device applications. Here thermal control is shown to manipulate electric and magnetic orders in a single-phase quasi-two-dimensional halide perovskite.
Employing a remote Coulomb superlattice formed by twisted bilayer WS2, the authors demonstrate the engineering and on/off switching of a Coulomb superlattice of correlated states in bilayer graphene with period and strength determined by the remote superlattice.
Plastic deformation requires the propagation of a kinked profile along dislocations. It is shown that each kink acts as a set of travelling thermal spikes, favouring the nucleation of supplementary kinks and long dislocation jumps that are observed experimentally.
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.
The authors demonstrate that magnetic proximity interactions in a hexagonal boron nitride-encapsulated MoSe2/CrBr3 van der Waals heterostructure have a striking difference in the two (K, K′) valleys of a monolayer MoSe2.
Both bosonic and fermionic collective states can emerge in two-dimensional semiconductor lattices, and mixing these species can further expand the landscape of quantum phases. Here, the authors report Bose–Fermi mixtures of neutral and charged excitons and the emergence of dual-density waves in an electrostatic lattice in a GaAs bilayer.
The authors report a strongly temperature-dependent thermal conductivity at low temperature, consistent with topological bosonic modes in a Chern-insulator-like model.