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The tunability of electronic properties is a central goal of research into topological semimetals. Here, the authors report Weyl nodal ring states in the magnetic semimetal EuGa₄ and link the nodal ring state to the observed large non-saturating magnetoresistance.

Three-dimensional Dirac semimetals such as Cd₃As₂ are attracting attention because their electronic structure can be considered to be the three-dimensional analogue of graphene’s. Low-temperature scanning tunnelling measurements of the 112 cleavage plane of Cd₃As₂ now reveal its electronic structure down to atomic length scales, as well as its Landau spectrum and quasiparticle interference pattern.

Pronounced quantum oscillations in magnetoresistance, a phenomenon that was only expected in metals with highly mobile carriers, are observed in the strongly insulating state of two-dimensional WTe₂.

The APOE-ε4 allele is the strongest genetic risk factor for late-onset Alzheimer’s disease, but it is not deterministic. Here, the authors show that common genetic variation changes how APOE-ε4 influences cognition.

Understanding collective behaviour is an important aspect of managing the pandemic response. Here the authors show in a large global study that participants that reported identifying more strongly with their nation reported greater engagement in public health behaviours and support for public health policies in the context of the pandemic.

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.

Correlation-driven topological phases with different Chern numbers are observed in magic-angle twisted bilayer graphene in modest magnetic fields, indicating that strong electronic interactions can lead to topologically non-trivial phases.

This study presents real-time observation of plasmon-driven hot carrier creation. Auger heating is operative in enhancing carrier energy beyond single-photon excitation. These findings open new avenues in plasmonic energy conversion and photocatalysis.

Placing a single layer of tungsten diselenide in contact with twisted bilayer graphene enables superconductivity even for non-magic twist angles where insulating behavior is absent.

A thermodynamic study of doped single crystals of NbFe₂ reveals the phase diagram of this system as a function of temperature, magnetic field and Nb doping — which includes an unusual quantum tricritical point.

Humanity’s Last Exam, a multi-modal benchmark at the frontier of human knowledge, is designed to be an expert-level closed-ended academic benchmark with broad subject coverage.

Alfvén waves are fundamental plasma modes that provide a mechanism for the transfer of energy between particles and fields. Here the authors confirm experimentally the conservative energy exchange between Alfvén wave fields and plasma particles via high-resolution MMS observations of Earth’s magnetosphere.

Results from the phase ELAD 2 trial reveal that liraglutide is safe and well tolerated in people with mild to moderate Alzheimer’s disease but does not significantly slow brain metabolism decline.

This study demonstrates 3D printing of hierarchically ordered, porous transition metal oxides and nitrides directed by block copolymer self-assembly, with record surface areas and nanoconfinement-induced critical fields in the nitride superconductors

Fractional quantum Hall states can be fragile, meaning that they are difficult to probe using electrical transport measurements. Now, thermal transport is shown to be a more sensitive technique for investigating these states.

De novo and inherited dominant variants in genes encoding U4 and U6 small nuclear RNAs are identified in individuals with retinitis pigmentosa. The variants cluster at nucleotide positions distinct from those implicated in neurodevelopmental disorders.

Fluidic force microscopy combines atomic force microscopy with microfluidic probes to enable measurement and manipulation of materials at sub-micrometre resolution. In this Primer, Zambelli et al. discuss the principles of fluidic force microscopy and applications in biological research and nanotechnology.

Searches for neutral fermionic, bosonic or anyonic excitations in unconventional insulators are discussed, and challenges in probing and using quantum insulators outlined, in this Perspective on future advancements offered by quantum materials and experimental schemes.

Photoluminescence from plasmonic nanostructures exhibits diverse wavelength dependent nonlinear behaviors with debated origins. Here, authors use plasmonic gap mode resonators with precise nanoscale confinement to show this nonlinear emission can become dominated by non-Fermi carrier contributions.

High-resolution scanning tunnelling microscopy and spectroscopy are used to provide evidence for unconventional superconductivity in magic-angle twisted trilayer graphene.

Scourzic et al. show that germinal centre B cells display an enhanced ability to reprogram to induced pluripotent stem cells compared to mature B cells. This ability indicates their higher plasticity level and is T follicular helper cell-dependent.

Here, the authors perform Faraday rotation spectroscopy around the excitonic transitions in hBN-encapsulated WSe₂ and MoSe₂ monolayers, and interlayer excitons in MoS₂ bilayers. They measure a large Verdet constant - 1.9 × 10⁷ deg T⁻¹cm⁻¹ for monolayers, and attribute it to the giant oscillator strength and high g-factor of the excitons.

Creative experiences such as dance, music, drawing, and strategy video games might preserve brain health. The authors show that regular practice or short training in these activities is linked to brains that look younger and work more efficiently.

At equilibrium, the ferroelectric polarization is proportional to the strain. At ultrafast timescales, an above-bandgap laser excitation decouples strain and polarization, which, out of equilibrium, is mainly determined by the photoexcited electrons.

Double-sided epitaxy of van der Waals materials through atomic membranes is demonstrated, enabling electrons to resonantly tunnel between aligned topological insulator surfaces with the conservation of energy, momentum and spin helicity.

Existing methods of characterizing electron beams carrying orbital angular momentum are inefficient as they allow measuring one OAM state at a time. Here the authors demonstrate an OAM spectrometer capable of analysing multiple OAM states and a potential tool for probing magnetic materials.

Placing monolayer tungsten diselenide on Bernal-stacked bilayer graphene promotes enhanced superconductivity, indicating that proximity-induced spin–orbit coupling plays a key role in stabilizing the pairing, paving the way for engineering tunable, ultra-clean graphene-based superconductors.

The temporal dynamics of phase transitions in strongly correlated states of matter are often dictated by the interplay between structural and electronic degrees of freedom. These are now probed in a perovskite manganite using an X-ray free-electron laser, and found to be well described by a single order parameter.

A Bose–Einstein condensate can exist in a superheated state well above the critical temperature if the interaction strength is tuned low. When the interactions are switched back on, the condensate boils away.

Heather Mefford, Ingrid Scheffer and colleagues report the identification of inherited mutations in GRIN2A that cause epilepsy-aphasia syndromes, which have a characteristic EEG pattern and developmental regression affecting language.

Haobo Xu and Rong Yang discuss how scaling laws and chemical engineering fundamentals help control the geometric precision of microdomes by transforming droplets into functional surfaces inspired by nature.

Manipulating the topological phases of quantum materials is necessary to fully leverage their potential for future electronics. Here, the authors experimentally demonstrate the controllable transition from a weak to a strong topological insulator phase through the in-situ application of high strain.

Van der Waals magnetic materials, which maintain their magnetic ordering down to a monolayer have been found to host a variety of spin textures, including topological spin textures such as skyrmions. Here, Khela et al. demonstrate laser induced topological switching, between skyrmions, anti-skyrmions and stripe domains in CrGeTe₃.

Magnetic domain walls could form the basis for information technology with high storage density, but require comparatively high current densities to be moved by spin torque. Here, the authors demonstrate a radically different approach with perpendicular magnetic field pulses moving domain walls synchronously.

The rational design of optoelectronic devices based on 2D materials relies on quantitative knowledge of their excitonic properties. Here the authors perform circularly-polarized absorption spectroscopy on monolayer \({{\rm{MoS}}}_{2},{{\rm{MoSe}}}_{2},{{\rm{MoTe}}}_{2}\) and \({{\rm{WS}}}_{2}\) in magnetic fields up to 91 T, and derive the effective exciton masses, binding energies, radii, dielectric properties, and free-particle bandgaps of these monolayer semiconductors