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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.

Aperiodic composite crystals were discovered that emulate 2D moiré materials, demonstrating a potentially scalable approach for producing moiré materials for next-generation electronics and a generalizable approach for realizing theoretical predictions of higher-dimensional quantum phenomena.

High hole mobilities in a polarization-induced two-dimensional hole gas at a gallium nitride/aluminium nitride interface can allow Shubnikov–de Haas oscillations of light and heavy holes to be observed in gallium nitride.

Deploying deep learning models efficiently on heterogeneous hardware remains challenging. Here, authors present a mixed-precision supernetwork that jointly optimizes model mapping and adaptation, enabling faster search, higher accuracy, and improved energy efficiency on analog-digital accelerators.

Approach and avoidance behavior is disrupted in many psychiatric disorders, but the neural circuits that support this behavior are unknown. Here, the authors identify a theta-mediated limbic circuit that support approach and avoidance decision-making, contributing to a network understanding of psychiatric disorders, especially those characterized by maladaptive avoidance.

Experimental evidence of coherent charge transport in the normal state of the kagome metal CsV₃Sb₅ is presented, revealing the nature of correlated order in kagome metals and new directions for exploring quantum coherence in correlated electron systems.

The authors study microstructured UTe₂ by high-field transport, focusing on the field-reinforced superconducting phase. They reveal a highly-directional vortex pinning force typical of quasi-2D superconductors, indicating a vortex lock-in state and consistent with a change of order parameter from the low-field superconducting phase.

Strong electron correlations often lead to unusual electronic ground states. Here, the authors present evidence for a density wave in the compound CeRhIn₅, the first for a so-called heavy-fermion metal where electrons have a very high effective mass.

Vaulet et al. developed and validated four continuous indices from histological lesion scores to assess kidney transplant rejection, offering an alternative to the Banff categories that reflect the continuous nature of rejection.

The properties of bilayer graphene can be tuned by twisting the layers relative to one another. Schmidt et al.now demonstrate the twist angle dependence of magnetotransport in this material system and uncover the formation of satellite Landau fans in the small-angle regime because of superlattice formation

Quantum oscillations in the three-dimensional topological semimetal CoSi are reported, where selected oscillation frequencies have no corresponding extremal Fermi surface cross-sections, representing instead oscillations of the quasiparticle lifetime.

The topological character of electrons in semimetals subtly influences their bulk properties, leading typically to weak experimental signatures. Here, Moll et al. report a distinctive anomaly in the magnetic torque upon entering quantum limit state in the Weyl semimetal NbAs, which only appears due to the presence of Weyl fermions.

An in-depth analysis of tissue biopsies from patients with multiple myeloma and CAR T cell therapy-associated immune-related adverse events (CirAEs) after treatment with commercial BCMA-targeted CAR T cell therapy shows that CD4⁺ CAR T cells mediate off-tumor toxicities and that high CD4:CD8 ratio at apheresis, robust early CAR T cell expansion, ICANS and ciltacabtagene autoleuce treatment are independently associated with the development of CirAEs.

Most patients with B-cell leukemia respond to chimeric antigen receptor T cell (CAR T) therapy, yet many relapse due to loss of CAR T function. Here, the authors show that the metabolism of CAR T from short- and long-term responders is different, which may explain why CAR T lose functionality.

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.

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.

A giant spin Seebeck effect—three orders of magnitude greater than previously detected—has been observed in a non-magnetic material, InSb; the proposed mechanism relies only on phonon drag and spin–orbit interactions in a spin-polarized system, not on magnetic exchange.

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.

Bio-based approaches to plastic degradation have been an intense area of research in recent years, and although they show great promise, they also raise societal, ethical and regulatory questions. Here the authors reflect on the Responsible Research and Innovation (RRI) implications of this growing field, sharing insights they have gained through engagement with stakeholders and the broader public.

Meta-analysis of 16 studies (n = 29,887) in low- or middle-income countries found that cash transfers improved child cognition, language, and motor skills. Conditional and “cash-plus” bundled programs outperformed cash alone for child development.

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.

The authors demonstrate quantum Hall effect in semiconducting layered oxide Bi₂O₂Se. Its unique low mass among the oxides of 0.14 m_e and pronounced layered structure makes Bi₂O₂Se highly susceptible to the quantum confinement effects.

Rare coding variants that reduce the activity of a protein can have a beneficial impact on health. Here, researchers identify rare genetic variants in the CHRNB3 gene that associate with reduced cigarette smoking across diverse populations.

Four-dimensional scanning transmission electron microscopy is able to capture intricate diffraction patterns at each probe position, yet traditional binary masks limit image specificity. Here, the authors introduce a method using real-space image correlations to create weighted masks, enhancing atomic-resolution imaging and enabling distinct visualization of atom columns, significantly advancing material characterization in complex specimens.

The properties of electronic transport through edge states of three-dimensional quantum Hall-like states are not yet resolved. Now, increasing the surface area of the edges is shown to produce increased conductance, suggesting that chiral surface states are present.

Theory predicts that phonons—quanta of lattice vibrations—can carry finite angular momentum and thus influence physical properties of materials. Now phonons with angular momentum have been seen in tellurium with a chiral crystal structure.

Group III/nitride semiconductors have been grown epitaxially on the superconductor niobium nitride, allowing the superconductor’s macroscopic quantum effects to be combined with the semiconductors’ electronic, photonic and piezoelectric properties.

Studies of quantum oscillations provide a valuable probe into the electronic structure of topological semimetals. Matusiaket al. demonstrate that quantum features in ZrSiS can be probed with greater sensitivity using diffusive thermopower than magnetization and electrical resistivity approaches.