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When BiFeO3 layers are confined between TbScO3 layers in an epitaxial superlattice, crystallographically orthogonal voltages can induce reversible, non-volatile switching between polar and antipolar states in BiFeO3. This symmetry switch also leads to marked changes in the nonlinear optical response, piezoresponse and resistivity of the system.
Soft actuators composed of a tough bioadhesive/elastomer shell encapsulating a stimuli-responsive metallic spring provide in situ mechanical stimulation of skeletal muscles to promote muscle tissue rehabilitation and prevent atrophy.
Two studies explore strongly correlated states of Bose–Fermi excitonic complexes realized in two distinct solid-state platforms, setting the stage for tabletop quantum simulators.
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.
A nanoparticle-based adjuvant incorporating a Toll-like receptor 7 agonist elicits cross-reactive antibodies for both dominant and subdominant epitopes and enhances immune responses against multiple variants of influenza and SARS-CoV-2.
The study of the inherent charge transport behaviour of 3D lead halide perovskite is challenging, owing to entanglement with ionic migration effects and dipolar disorder instabilities. Here, the authors circumvented both challenges and found that ion migration is much suppressed in mixed metal perovskite compositions relative to pure-Pb counterparts.
The high energy densities of Li-rich cathodes are promising for Li-ion batteries, but voltage hysteresis limits their practical implementation. Voltage hysteresis is shown to be related to collective migration of metal ions, and isolating migration leads to high-capacity reversible cathodes.
On-demand electron wavefront shaping is desirable for applications from nanolithography to imaging. Here, the authors present tunable photon-induced spatial modulation of electrons through their interaction with externally controlled surface plasmon polaritons.
High-Ni-content layered cathodes are promising for lithium-ion batteries, but investigating their delithiation-induced phase boundaries is challenging. Intralayer transition motifs at complex phase boundaries in these high-Ni electrodes are now resolved using deep-learning-aided super-resolution electron microscopy.
Colloidal nanocrystals can form into periodic superlattices exhibiting collective vibrations from the correlated motion of the nanocrystals. This Perspective discusses such collective vibrations and their as-of-yet untapped potential applications for phononic crystals, acoustic metamaterials and optomechanical systems.
Research on two-dimensional van der Waals ferroelectrics has witnessed an explosion over the past few years. This Perspective formulates a framework by which results can be analysed, reviews recent progress, discusses mechanisms and properties for applications, and outlines challenges to be addressed.
The authors study the electronic structure of the intercalated transition metal dichalcogenide V1/3NbS2, showing that its bulk magnetism can lead to a strong tunability of spin–valley locked states at its surface.
The authors present evidence suggesting that amorphous Bi2Se3 displays topological properties, signalling a new regime for the pursuit of topological matter.
The authors study ultrafast spatiotemporal dynamics of polaritons formed by mixing surface-bound optical waves with excitons observing a mobility transition from diffusive to ballistic transport flow at two-thirds the speed of light.
Silicon-based complementary metal-oxide semiconductors or negative differential resistance device circuits can emulate neural features, yet are complicated to fabricate and not biocompatible. Here, the authors report an ion-modulated antiambipolarity in mixed ion–electron conducting polymers demonstrating capability of sensing, spiking, emulating the most critical biological neural features, and stimulating biological nerves in vivo.
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.
