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Femtosecond time-resolved X-ray diffraction reveals that in the ultrafast demagnitization of ferromagnetic iron, about 80% of the angular momentum lost from the spins is transferred to the lattice on a sub-picosecond timescale.

A study of several longitudinal birth cohorts and cross-sectional cohorts finds only moderate overlap in genetic variants between autism that is diagnosed earlier and that diagnosed later, so they may represent aetiologically different conditions.

The coupling of ferroelectricity and magnetic order enables the tunability of material properties. Here, authors realize magnetic-field-enhanced ferroelectricity and electrical-field-controlled magneto-transport in non-magnetic moiré superlattices.

Electron hopping in geometrically frustrated lattices can result in a rich variety of unusual behaviours. Now, the orbital arrangement in a van der Waals metal with a non-frustrated, primitive lattice is found to show similar effects.

Superconductivity is induced in an accidental Dirac semimetal via the proximity effect.

Spin current carrying angular momentum enables intriguing phenomena and many fascinating applications. Here the authors demonstrate that thermally driven spin Seebeck current can give rise to the mechanical torque when transmitting through a Y₃Fe₅O₁₂ micro cantilever.

Graphene was one of the first materials proposed to host the quantum spin Hall effect. However, its weak intrinsic spin-orbit interaction means that observing such an effect requires modifying the graphene band structure. Here, Ghiasi et al. combine graphene with CrPS₄ and detect quantum spin Hall states at zero magnetic field.

There is a long-standing experimental effort to observe field-induced correlated states in three-dimensional materials. Here, the authors observe an unconventional Hall response in the quantum limit of the bulk semimetal HfTe₅ with a plateau-like feature in the Hall conductivity.

Potable reuse provides a reliable and sustainable option to drinking-water supply. However, its implementation is hindered by perceptions of potential health risks. Here, comparing potable reuse water with tap water, the authors show a lower level of cytotoxicity in reuse water.

Most of the notable properties of graphene are a result of the cone-like nature of the points in its electronic structure where its conduction and valance bands meet. Similar structures arise in 2D HgTe quantum wells, but without the spin- and valley-degeneracy of graphene; their properties are also likely to be easier to control.

Lipid nanoparticle-based delivery vehicles for mRNA are assembled from several different components. This Perspective discusses how these components react with each other and pose a particular analytical challenge that must be addressed to ensure the reproducibility, stability and safety of such drug formulations.

A 3D quantum Hall effect has been reported in Dirac semimetal ZrTe₅ due to a magnetic-field-driven Fermi surface instability. Here, the authors show evidence of quasi-quantized Hall response without Fermi surface instability, but they argue that it is due to the interplay of the intrinsic properties of ZrTe₅ electronic structure and Dirac semi-metallic character.

The observation of a negative Hall resistance in the magnetic-field-induced normal state of underdoped 'YBCO'materials, which reveals that these pockets are electron-like rather than hole-like. It is proposed that these electron pockets most probably arise from a reconstruction of the Fermi surface caused by the onset of a density-wave phase, as is thought to occur in the electron-doped copper oxides near the onset of antiferromagnetic order.

Electrons trapped to a two-dimensional plane can exhibit many exotic properties. Here, the authors use a technique that measures entropy per electron to explore the evolution of such a system from the Fermi liquid regime to a previously unexplored regime of a strongly correlated charged plasma.

The physical properties of organic metals have generally been described in terms of a highly correlated Luttinger liquid. Using angle-resolved photoelectron spectroscopy, Kisset al. measure the Fermi surface of (BEDT-TTF)₃Br(pBIB), and find that, in contrast to other systems, it can be described as a Fermi liquid.

Superconductivity in the iron pnictides is believed to be related to quantum critical fluctuations. Putzke et al. observe unexpected anomalies in the critical fields of BaFe₂(As_1−xP_x)₂that emerge close to its magnetic critical point, which they argue is a generic feature of quantum critical superconductivity.

Federated learning (FL) algorithms have emerged as a promising solution to train models for healthcare imaging across institutions while preserving privacy. Here, the authors describe the Federated Tumor Segmentation (FeTS) challenge for the decentralised benchmarking of FL algorithms and evaluation of Healthcare AI algorithm generalizability in real-world cancer imaging datasets.

Perineural invasion and cancer-induced nerve injury of tumour-associated nerves are associated with poor response to anti-PD-1 therapy, which can be reversed by combining anti-PD-1 therapy with anti-inflammatory interventions.

Landau states are associated with the quantised orbits of charged particles in magnetic fields. By manipulating electron vortex beams in a magnetic field, this study reconstructs the internal quantum dynamics of free-electron Landau states, which differs strongly from the classical cyclotron rotation.

Electron correlation normally makes electrons less mobile, but it is still not clear when correlation becomes very strong in Dirac semimetals. Here, Fujioka et al. report a very high electron mobility exceeding 60,000 cm²V⁻¹s⁻¹ in correlated Dirac semimetal of perovskite CaIrO3, due to the enhanced electron correlation nearby the Mott transition.

It was predicted that in the regime of strong electron-phonon interactions, electrons and phonons can form a coupled non-equilibrium state, characterized by the conservation of the total momentum and by hydrodynamic transport. Here, the authors report experimental evidence for such a coupled electron-phonon liquid in NbGe₂.

A survey across 90 societies reveals that variation and change in everyday norms are explained by a single value dimension: the priority societies place on individualizing versus binding moral concerns.

High charge-carrier mobility that enables the observation of quantum oscillation is reported in mono- and few-layer MoS₂ encapsulated and contacted by other two-dimensional materials.

Ultrafast electron diffraction is used here to reveal in nickel an almost instantaneous, long-lasting population of anisotropic phonons with angular momentum.

We demonstrate the emergence of magnetism induced by a terahertz electric field in SrTiO₃.

Pathology-oriented multiplexing (PathoPlex) represents a framework for widespread access to multiplexed imaging and computational image analysis of clinical specimens at a relatively high throughput and subcellular resolution.

Although theoretical advances in the reactivity of organic compounds have progressed rapidly, a complete understanding of the causal relationships between molecular structures and reaction outcomes based solely on first principles remains elusive. Here, the authors use an in-house HTE platform to conduct over 11,000 distinct acid amine couplings, with an accompanying Bayesian neural network model that gives a prediction accuracy of 89.48% for reaction feasibility.

By utilizing the van der Waals electron acceptor α-RuCl₃, this study establishes a p-type connection with WSe₂, facilitating a high hole mobility of 80,000 cm² V^–1 s^–1 for investigating quantum transport properties in a magnetic field of over 30 T.

In Weyl semimetals, unusual electronic transport phenomena are predicted to occur, such as an axial anomaly which violates the conservation of chiral fermions. Here, the authors evidence such behaviour via the occurrence of negative magnetoresistance in layered high-purity non-magnetic metals.