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The authors report the experimental observation of room-temperature condensation of exciton polaritons in quasi-2D layered crystals of halide perovskite, integrated into an open optical microcavity. These materials combine van-der-Waals properties with dominant exciton physics at room temperature.

Reaching fundamental noise limits permits optimal extraction of spectroscopic information from an absorption measurement. Here, the authors demonstrate a quantum-limited spectrometer with which they can obtain an extremely accurate measurement of the excited-state hyperfine splitting in Cs.

The Landé factors govern all the spin-related basic phenomena and are the key parameters which guide spintronics applications. Here, Kirstein et al. demonstrate a universal dependence of the Landé factors on the bandgap energy of several perovskite materials.

Topological defect quadrupoles orchestrate predictable failure patterns in active nematic solid networks.

Manipulation of spins in the solid state is a promising avenue for quantum information and field sensing applications. Bennett et al. demonstrate voltage tunability of single-spin states in a quantum dot as a step towards universal control of a single spin with a single electrical gate.

In geometrically frustrated magnets, long-range magnetic order is typically suppressed, whereas at the same time non-trivial spin correlations are observed. Using time-domain terahertz spectroscopy, the authors find evidence for extended quantum string-like excitations in the quantum spin ice material Yb₂Ti₂O₇.

Optically active semiconductor quantum dots have so far suffered from nuclear inhomogeneity limiting all dynamical decoupling measurements to a few microseconds. Lattice-matched GaAs–AlGaAs quantum dots now enable decoupling schemes to achieve a 0.11 ms spin coherence time.

The Perseverance rover detected polycyclic aromatic hydrocarbons preserved within sulfates in the fan and floor of Jezero crater on Mars, offering new insights into past habitability and the preservation of organic matter on Mars.

The discovery of a vast reservoir of primordial neutral hydrogen gas surrounding a young galaxy cluster just one billion years after the Big Bang offers new insight into how the first large cosmic structures assembled.

Elastic anisotropy of liquid crystals elastomers is typically measured at low frequencies for the applications such as soft robotics, actuators, and origami. Here the authors study the elastic anisotropy of LCE using Brillouin light spectroscopy at gigahertz frequencies such as radio frequencies or 5 G cellular networks.

The electrons and holes in a semiconductor can bind together to form excitons, which in turn couple together at higher carrier densities to create biexcitons. Here, the authors show, contrary to expectation, that biexcitons can outlive excitons at carrier densities close to the appearance of unbound electrons and holes.

Single iron atoms on nitrogen-doped carbon catalysts are a promising alternative to platinum for the oxygen reduction reaction on fuel cell cathodes, but commonly suffer from low stability. Here an in situ chemical vapour deposition synthetic approach is presented, enabling high iron active site dispersion and reducing surface porosity, which mitigates demetallation and carbon corrosion, ensuring high activity and stability.

This study shows that the nodal loop topology in LaSb_xTe_2−x can be controlled by chemical substitution and electron doping. The reversible opening and closing of a gap larger than 400 meV in the nodal loop enables on-demand switching of topology.

Two Co single crystal surfaces remain metallic up to 1 bar during Fischer-Tropsch synthesis. The observed intermediates support the carbide mechanism as the reaction pathway. By adding and removing CO we can follow the dynamics of the (dis)appearance of intermediates.

Excitons control the optical properties of transition metal dichalcogenide monolayers. Here, the authors measure the exciton fine structure of MoS₂ and MoSe₂ monolayers encapsulated in hBN in magnetic fields up to 30 T, and observe a brightening of the spin-forbidden dark excitons in MoS₂.

A completely solid-state, single-chip, microwave-frequency surface acoustic wave phonon laser can generate coherent phonons from thermal noise or resonantly amplify injected phonons using only a direct current bias field.

Femtosecond photoexcitation drives a coherent twist–untwist motion of the moiré superlattice in 2° and 57° twisted WSe₂/MoSe₂ heterobilayers.

The highest-quality JWST spectra reveal that little red dots are young supermassive black holes shrouded in dense cocoons of ionized gas, where electron scattering, not Doppler motions, broadens their spectral lines.

The synthetic biology era has seen a rapidly growing number of engineered DNA sequences. Here, the authors develop a deep learning method to predict the lab-of-origin of a DNA sequence based on hidden design signatures.

Vinyl acetate is an important polymer building block, but the mechanisms governing its catalytic production are not well understood. This study shows that dynamic palladium-acetate clusters determine catalyst efficiency and selectivity in vinyl acetate synthesis.

Advances in synthetic biology and genome engineering raise awareness of potential misuse. Here, the authors present PlasmidHawk, a sequence alignment based method for lab-of-origin prediction.

Half-Heusler compounds are predicted to bear topological properties, which is yet to be experimentally evidenced. Here, Logan et al.report experimental evidence of a topological surface state in epitaxially grown thin films of the half-Heusler compound PtLuSb, providing a candidate for new spintronic devices.

The wetting on soft surfaces is less understood than that on rigid ones because it is challenging to quantify substrate deformation. Here, the authors monitor the deformation over a large range of droplet velocities, and propose a dynamical model that captures contact line motion and depinning.

There is considerable interest in generating broadband frequency combs at terahertz frequencies. Here, Tammaro et al.achieve this using coherent synchrotron radiation where the electron bunches emit quasi-synchronous terahertz pulses with high power, broad frequency, zero frequency offset, and high density.

By analysing Hubble Space Telescope/Cosmic Origins Spectrograph spectra, evidence is provided for the presence of a Magellanic Corona surrounding the Large Magellanic Cloud, as predicted given its high mass.

Opacities are considered to be the source of the disagreement between theoretical solar models and helioseismic data. Here, the authors show solar opacity profiles derived from seismic inferences, which differs from theoretical values used in the solar models.

The authors study epitaxial thin films of the pyrochlore-sublattice compound LiTi2O4 by RIXS and ARPES. They observe cooperation between strong electron correlations and strong electron-phonon coupling, giving rise to a mobile polaronic ground state in which charge motion and lattice distortions are coupled.

Two-dimensional perovskites enable high efficiency in perovskite photovoltaics but compromise operational stability. Yaghoobi Nia et al. form two-dimensional perovskite co-crystals with neutral templating molecules, improving the stability of perovskite solar modules.

The mechanochemical dechlorination of poly(vinyl chloride) (PVC) can catalyse reactions through the release of chlorides. Here, the authors use TiO₂ as a contact-electro-catalyst to achieve PVC dechlorination via ball-milling for the solvent-free, mechanochemical chlorination of alcohols.

Hydrostatic pressure is an underexplored tuning knob to study moiré systems. Here a MoS₂/WSe₂ heterostructure is compressed and the enhancement in the moiré potential strength is quantified via moiré-activated Raman modes.

The metallicity of the interstellar medium measured towards 25 stars relatively near the Sun shows large variations, suggesting that infalling pristine gas is not efficiently mixed in the interstellar medium.

Alkaline-earth phenoxides show promise as optical cycling centres; however, their properties when connected to larger structures is unclear. Now it has been shown that their optical cycling remains efficient despite increasing molecular complexity, enabling the scaling of laser-coolable molecules toward larger structures and surface-bound quantum systems.

Enzymes are viscoelastic, deformable machines. Mutating high-strain regions in these machines affect their catalytic function.

Nonlinear Hall effect is a potential tool for exploring correlated phase transitions in topological semimetals. Here, the authors demonstrate an enhanced nonlinear Hall effect arising from a one-dimensional charge density wave in TaIrTe₄.

The authors demonstrate that the response of the flexural vibrations of twisted bilayer graphene can be hysteretic depending on the angle between the lattices of the layers, finding that the quality factors of the vibrations are enhanced compared to untwisted bilayers.

Quasi-elastic neutron scattering measurements show the existence of a body-centred cubic structure, similar to that of ice VII, where water molecules exhibit picosecond rotational dynamic and rapid orientational jumps characteristic of liquid water.

The coexistence of frustrated magnetism and bond order is demonstrated in a family of antiferromagnets. Layers of dual frustrated orders are interleaved in the same crystal lattice, which presents an exciting possibility for engineering new responses.

An Fe^III/V redox mechanism in Li₄FeSbO₆ on delithiation without Fe^IV or oxygen formation with resistance to aging, high operating potential and low voltage hysteresis is demonstrated, with implications for Fe-based high-voltage applications.

Quantum communication networks would greatly benefit from the possibility to have solid-state emitters being directly interfaced with telecom fibers, without the need for wavelength conversion. Here, the authors demonstrate coherent control of an InAs/InP quantum dot, as well as entanglement between its electron spin and the frequency of a telecom photon.

Here the authors report the synthesis of defect-rich boron nitride by flux reconstruction method, which exhibited good reactivity for semihydrogenation of low concentration acetylene in ethylene-abundant gas stream.

This study elucidates nanoscopic strain evolution in single-crystal Ni-rich positive electrodes, demonstrating that mechanical failure results from lattice distortions, and redefines the roles of cobalt and manganese in battery cycling stability.

Electrochromic materials are widely explored in energy-saving smart windows, yet combining fast switching, neutral black coloration, and robust long-term durability remains challenging. Here the authors report a solution processed n-doped poly(benzodifurandione) affording an electrochromic black window that overcomes these limitations.

Monoamines act as neuromodulators in the nervous system, but their evolutionary origins are unclear. Here, the authors examine the evolution of genes involved in monoamine production, and processing suggesting that the monoaminergic system evolved in the bilaterian stem-group.

Here, the authors create a high-quality-factor chiral metasurface that enables record-high room-temperature valley-selective emission in MoSe₂ monolayers, independent of excitation polarization.

CD44 expressed by fibroblastic reticular cells in secondary lymphoid organs regulates trafficking of dendritic cells, and thus has an essential role in the priming of T cells and the adaptive immune response.

Long-distance quantum communication relies on interfacing qubits with telecom-band photons. Here the authors implement a solid-state spin-qubit based on a hole confined in a semiconductor quantum dot emitting photons in the telecom C-band.