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Realizing >5 V batteries is hindered by the instability of electrolytes. Here, a fluoride shielding layer, LiCl-4Li₂TiF₆, enables high-voltage, high-capacity all-solid-state batteries because of its combined oxidative stability and Li⁺ conductivity.

Scaling effects on ferroelectric domains could impact applications for next-generation miniaturized devices. Here brownmillerite oxides are shown to demonstrate ferroelectric domains with widths down to the sub-unit-cell level.

The authors demonstrate nano-engineered thin film thermoelectric materials are attractive for practical solid-state refrigeration with semiconductor manufacturing and ultra-low 0.003-cc materials usage.

Asynchronous and interferometric transient absorption is used to spectroscopically investigate perovskite nanomaterials undergoing light-induced reactions during measurements, monitoring the associated real-time ultrafast photophysical changes of materials.

A stealthy neural recorder allows for the study of the behaviour of non-human primates in naturalistic settings.

While emission and stability of metal–halide perovskites can be enhanced through heterostructural encapsulation, a controlled synthesis route to such structures is not trivial to realize. Here, the authors design a mechanochemistry-driven protocol for synthesizing highly luminescent CsPbBr₃/Cs₄PbBr₆ heterostructures.

Muñoz-Gil and colleagues report the results of an open challenge where they benchmarked algorithms for the characterization of motion changes in single-particle tracking. By ranking methods on simulations, the competition revealed strengths and limitations of AI and classic approaches, guiding researchers toward optimal tools.

Low-dimensional ferroelectric systems are predicted to have topologically nontrivial polar structures, such as vortices or skyrmions. Here authors present atomic-scale 3D topological polar structures in BaTiO₃ nanoparticles using atomic electron tomography and revealed their size-dependent transitions.

The stability of polymer electrolyte membrane fuel cells is limited by the degradation of the cathode catalyst during repetitive start-up/shut-down events — a parasitic oxygen reduction reaction on the anode causes an instantaneous potential jump at the cathode. The issue is now addressed by selectively suppressing the oxygen reduction reaction on the anode by exploiting the metal–insulator transition behaviour of Pt/H_xWO₃ catalysts.

Unrestricted integration of single-crystal oxide films on Si substrates allows for exploitation of emerging functionality of new materials in mature silicon devices. Here the authors integrate epitaxial oxide films with sharp metal-insulator transition on Si substrates by epitaxial lift-off of a freestanding nanomembrane.

The research to utilize chemical potential mismatch for materials synthesis has been limited across the oxide interface. Here, the authors show that directional ionic transport from the VO₂ layers stabilizes the rutile TiO₂ phase at extremely low temperatures, at which epitaxy is difficult, by effectively lowering the activation barrier for crystallization.

A capacitive, fibre-like stretchable strain sensor, formed of two conductors in a double helical structure, can be combined with an inductive coil to create a wireless strain-sensing system for biomedical applications.

Spinodal decomposition, spontaneous phase separation process for periodic lamellae at the nanometer scale, of correlated oxides (Ti, V)O₂ systems offers a sophisticated route to achieve new class of mesoscale structure in the form of self-assembled superlattices. Here, we achieve the tunable self-assembly of (Ti, V)O₂ superlattices with steep metal-insulator transition (ΔT_MI < 5 K) by spinodal decomposition with accurate control of growth parameters. Increase in a film growth rate thickens a lamellae period; the phase separation were kinetically enhanced by adatom impingement during two-dimensional growth, demonstrating that interplay between mass transport and uphill diffusion yields highly periodic (Ti, V)O₂ superlattices.

By combining the MoS2 channel with the PEDOT:PSS floating layer, a new concept device is proposed. This work demonstrates optoelectronic memory operation with high mechanical endurance through a 1,000-cycle bending test, which also offers multilevel memory programming operation based on light intensity and color.

The scattering of charge carriers with line defects, i.e., threading dislocations, needs to be decreased to further enhance electron mobility of lattice-mismatched epitaxial films and heterostructures for the application of high-performance electronic devices. Here, we report a strategy to post-treat epitaxial La-doped BaSnO₃ films by delicately controlling oxygen partial pressure p(O₂), which achieved significant increase in room temperature electron mobility to 122 cm²∙V⁻¹∙s⁻¹. This mobility enhancement is attributed to an oxygen vacancy-assisted recovery process that reduces the density of dislocations by accelerating the movement of dislocations in ionic crystals under p(O₂)-controlled treatment, despite an increase in the density of charged point defects.

Multidimensional electronic spectroscopy techniques still have many limitations. Here, the authors introduce a 2D electronic spectroscopy technique that uses broadband, synchronized mode-locked lasers to study dynamics on a wide range of timescales.

It is shown that vanadium dioxide thin films can reversibly accommodate hydrogen within their lattice structures, while demonstrating an insulator–metal–insulator phase modulation with hydrogen doping.

The control of magnetism by electric field is an important goal for future development of low-power spintronics. Here, the authors demonstrate voltage control of magnetism in van der Waals ferromagnetic/ferroelectric heterostructure devices via the strain-mediated magnetoelectric effect.

Combining Lorentz transmission electron microscopy and micromagnetic simulations, we discover a high-density homochiral Néel-type skyrmion phase in a Pt/Co/Ru/Pt/CoFeB/Ru magnetic multilayer structure that is stable at high temperatures up to 733 K. The domain phase in this system can be modulated between a high-density skyrmion phase, an isolated skyrmion phase, or a stripe domain phase by appropriate tuning of external and material parameters. This finding suggests that multilayer Néel-type skyrmions can be utilized in nonvolatile spin-based electronic devices that require operation at elevated temperatures.