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Dynamic nanodomains in lead halide perovskites, dictated by A-site cations, crucially affect the optoelectronic properties by modulating electronic disorder and consequently enabling better solar cells and optoelectronic devices.

Some of the diffuse intensities observed in electron diffraction patterns of face-centred cubic multi-principal element alloys are due to reflections from higher-order Laue zones.

Time-resolved wide-angle X-ray scattering (TR-WAXS) using synchrotron radiation can be used to observe dynamic protein structural changes with nanosecond time resolution in solution, complementing time-resolved optical spectroscopy and Laue crystallography methods.

Magnetoresistance of topological semimetal shows unusual electron transport behaviour. Here, Arnold et al. demonstrate detailed Fermi surface topology of Weyl semimetal TaP and show that negative longitudinal magnetoresistance shows up without well-defined Weyl fermions.

Four-coordinate cobalt(II) complexes possess high energy barriers toward inversion of the magnetic moment, but not the magnetic bistability needed for magnetic data storage. Here, the authors report an air-stable radical-bridged binuclear cobalt(II) complex with improved magnetic properties.

Laser spectroscopy measurements of the fermium isotopic chain show a smooth trend in the nuclear size of heavy actinide elements, and diminishing shell effects on the size evolution compared with lighter nuclei.

The influence of Li occupancy on electro-chemomechanical stability in Co-free Ni-rich layered oxides for Li-ion batteries has been overlooked. Here, authors investigate different Li structural units in the oxide lattice and show that tuning the Li occupancy improves battery cycling stability.

A number of disease-causing human transthyretin (TTR) mutations are known to lead to amyloid formation. Here the authors combine neutron crystallography, native mass spectrometry and modelling studies to characterize the T119M and S52P-TTR mutants, providing mechanistic insights into TTR amyloidosis.

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.

During mercerization, cellulose undergoes a conversion from form I to form II which involves change of the direction of every other cellulose chain but a clear understanding of how this change happens is lacking. Here, the authors use neutron diffraction on deuterium labelled cellulose to demonstrate that chains fold back on themselves in a zigzag pattern to form crystalline anti-parallel domains.

The spiral spin liquid is a spin liquid state characterized by short range correlations that maintain the spin spiral locally, but without the global order of the standard spin spiral. Material realization of this state has been lacking. Here, through neutron scattering measurements, Andriushin et al confirm a spiral spin liquid state in AgCrSe₂.

Some features resembling superconductivity at high temperature have been seen under pressure in La₃Ni₂O₇, but a transition to a zero-resistance state has not been observed. Now transport studies demonstrate this transition, along with strange metallicity.

The low thermal conductivity in filled skutterudites has been ascribed to rattling atoms inducing a phonon glass. Experimental evidence now shows that the phonon glass description is incorrect, and provides essential insight for the development of microscopic models aimed at describing the thermoelectric properties of these materials.

Using several ultrafast diffraction and microscopy techniques, demagnetization-driven interlayer shear of a van der Waals antiferromagnet is visualized at the nanoscale.

At the nanoscale, elastic strain and crystal defects largely influence the properties and functionalities of materials. Here, the authors report an unusual twin boundary migration process in a single platinum nanoparticle during carbon monoxide oxidation using Bragg coherent diffraction imaging.

Pseudomonas aeruginosa employs lectins to bind to its host cells, and is known to be the major cause of lung infections. Lectin B (LecB) from Pseudomonas aeruginosa binds specifically to galactose and fucose and is important for pathogenicity, adhesion and biofilm formation. In this work, the neutron crystal structure (1.9 Å) of the deuterated LecB/Ca/fucose complex is reported. The structure, in combination with perdeuteration of the ligand and the receptor allowed the observation of hydrogen atoms, protonation states and hydrogen bonds involved in the interaction between pathogenic bacteria and host cells. Thus the study provides structural insights into the mechanism of high affinity binding of LecB to its targets.

Ferromagnetic systems rarely display a large or non-saturating magnetoresistance, due to the low Fermi velocity of the predominant charge carrier. Here, the authors show that MnBi, a ferromagnet, bucks this trend, showing both large and non-saturating magnetoresistance, and high charge carrier motilities.

Within the phase diagram of pure substances, the supercritical state is not fully understood. Here the authors experimentally observe a gas-like to liquid-like crossover in the self-dynamics of supercritical fluid methane upon pressure increase.

Here authors use calorimetry to quantify chemical short-range order (CSRO) experimentally, in good agreement with atomistic simulations. Synchrotron in-situ tensile testing showed no effect of varied CSRO levels on mechanical properties.

Large-amplitude, infrared-active vibrations excited in a LaAlO₃ substrate induce magnetic order melting in a NdNiO₃ film. The melt front initiated at the interface propagates in the film at supersonic speeds, likely to be driven by electronic processes.

Experiments demonstrate a class of van der Waals nanowires, made from layered crystals of the semiconductor germanium sulfide, in which a tunable interlayer twist evolves naturally during synthesis.

Many material properties are governed by the internal dislocation network within the material. Here, the authors describe a method to determine the three dimensional position and type of dislocations from a measurement along only a single direction within a scanning transmission electron microscope.

Chiral topological materials have been predicted to host orbital angular momentum monopoles, which can be useful for orbitronics applications. Now such monopoles have been imaged in chiral materials.

Methane dynamics at the interface of ice clathrate structures is expected to play a role in phenomena ranging from gas exchange to methane mobility in planetary cryospheres. Here, the authors observe extremely fast methane diffusion at the interface of the two most common clathrate hydrate structures.

Although novel topological quasiparticles have recently been evidenced, their electrical transport properties remain elusive. Here, the authors report ultra-low resistivity down to 6 nΩcm at 2 K in MoP with a large mean free path, which hints on the exotic properties of triple point fermions.

Ferromagnetic insulators offer low magnetic damping, and potentially efficient magnetic switching, making them ideal candidates for spin-based information processing. Here, Zheng et al introduce a ferromagnetic insulator spinel, Li_0.5Al_1.0Fe_1.5O₄, with low magnetic damping, perpendicular magnetic anisotropy, and no magnetic dead layer.

Spin-state crossovers are phenomena where, under changes in temperature or pressure, the spin-state of an ion changes. In some materials, this spin-state crossover occurs simultaneously with a metal-insulator transition, driven by a valence transition. Control over such valence, spin-state, and metal-insulator transitions has much technological appeal, but, thus far, materials displaying this have been limited to cryogenic temperatures. Here, the authors show that in strained films of (Pr1-yYy)1- xCaxCoO3-δ, these transitions can be promoted to room temperature.

Michael Jentschel and Klaus Blaum explain why the most famous equation of physics needs checking — and how to do it.

High entropy alloys are multi-element random alloys with a strong short range disorder. Here, the authors show that their heat carrying lattice waves, while strongly attenuated by the force-constant disorder, propagate until high energy.

The crystal structure of the full-length human glucagon receptor reveals the essential role of the 12-residue ‘stalk’ segment and an extracellular loop in the regulation of ligand binding and receptor activation.

Serial femtosecond crystallography is an X-ray free-electron-laser-based method that uses X-ray bursts to determine protein structures. Here the authors present the structure of a photosynthetic reaction centre, an integral membrane protein, achieved with no sign of X-ray-induced radiation damage.

Kagome-lattice systems host a variety of condensed matter phenomena. Here, the authors use NMR spectroscopy to probe the orbital-selective modulations of the local density of states in the charge density wave phase of ScV₆Sn₆.

Comparison of terahertz spectroscopy measurements with theoretical results for the Heisenberg–Ising chain antiferromagnet demonstrates the existence of repulsively bound magnons in large transverse fields below the quantum critical point.