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Juno radio occultations precisely redefine Jupiter’s shape, measuring a polar diameter of 66,842 km and an equatorial diameter of 71,488 km, both smaller than long-used values, bringing models of the planet’s interior into better agreement with observations.

Electron or hole doping in a Mott insulator leads to superconductivity, with the mechanism obscured by multi-orbital Fermi surface reconstructions. Here, Kawasugi et al. report doping dependent Hall coefficients and resistivity anisotropy of an organic Mott insulator, revealing doping asymmetry of reconstructed Fermi surface of a single electronic orbital.

Distinguishing band and Mott insulators experimentally represents a longstanding challenge. Here, the authors demonstrate a momentum-resolved signature of a dimerized Mott-insulator in the out-of-plane spectral function of Nb₃Br₈.

Quantum simulation offers an unparalleled computational resource, but realizing it for fermionic systems is challenging due to their particle statistics. Here the authors report on the time evolutions of fermionic interactions implemented with digital techniques on a nine-qubit superconducting circuit.

Precise control of charge and spin states in quantum dots is often challenging. Here, the authors show systematic manipulation of the electron occupation in graphene nanoribbons laying on MgO.

Using scanning tunnelling microscopy and spectroscopy, fractional edge excitations are observed in nanographene spin chains, enabling the potential to study strongly correlated phases in purely organic materials.

Quantum correlated materials offer a promising platform for the study of unconventional heat transport. Here the authors theoretically investigate heat transport in a layered correlated material, triggered by an ultrafast excitation, and predict various transport regimes controlled by correlations.

The still-developing understanding of topologically non-trivial phases of matter has led to new mechanisms for unconventional many-body behaviour. Here the authors present a model where the symmetry needed for a symmetry-protected topological phase only emerges after the formation of long-range order.

Strong correlation effects in metals lead to unconventional emergent behavior that depends on the nature of interactions at the microscopic scale. Deng et al. identify distinct signatures of the so-called Mott and Hund regimes, which may guide the theoretical understanding of correlated materials.

Developing efficient and stable electrocatalysts is crucial for the oxygen evolution reaction. The authors introduce low-valence Na to construct oxygen non-bonding bands on high-entropy hydroxides, achieving 2000 hours of stability at 500 mA cm⁻² in an anion-exchange membrane electrolyzer.

The realization of the fractional quantum Hall effect with ultracold atoms in optical lattices is much sought after. Here, the authors propose a new way of obtaining fractional quantum Hall states in lattice systems by transforming a nonlocal abstract model into an implementable scheme.

Controllable two-qubit interactions are necessary to build a functional quantum computer. Here the authors demonstrate fast, coherent swapping of two spin states mediated by a long, multi-electron quantum dot that could act as a tunable coupler mediating interactions between multiple qubits.

A detailed resonant inelastic X-ray scattering (RIXS) study of a series of well-known cuprate superconductors reveals a correlation between the number of apical oxygens in these systems, and the strength of their in-plane exchange interaction.

Quantifying the degree of correlation required to drive a Mott insulator transition is a crucial aspect in understanding and manipulating correlated electrons. Here, the authors introduce a thallium-based cuprate system and use resonant inelastic X-ray scattering, combined with Hubbard-Heisenberg modeling, to establish a universal relation between electron interactions and magnon dispersion, suggesting optimal superconductivity at intermediate correlation strength.

Metallic surface states on CoO₂ and Pd terminated surfaces due to electronic reconstruction have been observed in the CoO₂-based delafossites. In contrast, here the authors report an interesting insulating state on the CrO₂ terminated surface of PdCrO₂ due to charge-disproportionation.

Nickelates have recently joined the cuprates and iron pnictides as unconventional superconductors with transition temperatures above 80 K. This Review looks for their shared superconducting mechanisms for building a coherent theoretical framework.

Compositionally complex alloys have attracted significant attention recently, but the role of electronic correlations in these materials is unknown. Redka et al. study the CrMnFeCoNi alloy using a combination of experimental and theoretical techniques, revealing strong correlation effects far from the Fermi edge.

The influence of spin–orbit coupling on itinerant electrons underlies the formation of spin–orbit Mott states. Here, the authors demonstrate a temperature-hysteretic cascade between charge-ordered phases stabilized by localized 5dspin–orbit Mott dimer states in metallic iridium ditelluride.

The authors present ARPES measurements on the triple-layer cuprate superconductor Bi₂Sr₂Ca₂Cu₃O_10+δ. They find that, although the doping level of the inner CuO₂ plane is extremely low in under-doped samples, the d-wave superconducting gap is enhanced at the antinode and persists well above T_c without a Fermi arc, indicating a “nodal metal”.

Kagome materials host nearly dispersionless electronic bands, but an ideal flat band close to the Fermi level is difficult to realize. Here the authors report evidence for a flat band near the Fermi level and flat-band-originated ferromagnetic fluctuation induced by orbital selective correlations in Sc₃Mn₃Al₇Si₅.

The MOUNTAINEER phase 2 trial demonstrated the efficacy and safety of tucatinib (HER2-targeted TKI) and trastuzumab (anti-HER2 antibody) in patients with HER2 + , RAS wildtype unresectable or metastatic colorectal cancer that had progressed on chemotherapy, resulting in the approval of the regimen. Here, the authors report the updated analysis of the MOUNTAINEER trial.

Precision-engineered devices consisting of a linear array of ten quantum dots are used to realize both the trivial and topological phases of the many-body Su–Schrieffer–Heeger model.

Zig-Zag graphene nanoribbons have edge states that are predicted to be spin-polarized, however, measurement of these spin-polarized states has proved elusive. Here, Brede et al overcome this challenge by growing graphene nanoribbons on ferromagnetic GdAu2, allowing for the direct observation of the spin-polarized edge states.

Evidence for metal–insulator transitions in dilute 2D electron gases has sparked controversy and debate. A new model suggests such behaviour could arise from strong correlations driven by non-local Coulomb interactions, providing an alternative view to that which considers disorder to be the over-riding influence.

The pseudogap phase exhibited by the cuprates is almost as enigmatic as superconductivity in these materials itself. A time-resolved study performed by Cilento et al. suggests that this state can be photoexcited into a transient non-equilibrium state that is more conductive than the equilibrium state.

The authors study electron-doped cuprate superconductor Pr_1−xLaCe_xCuO_4-δ using ARPES and muon spin spectroscopy. They find that T_c is proportional to the quasiparticle weight of the hole pocket near the nodal points, which arises from Fermi-surface reconstruction associated with antiferromagnetic order.

The optical properties of nanoalloys are complex and difficult to describe. Here, the authors use density functional and Mie theory to calculate the extinction of Au-Co and other nanoalloys of interest for quantum optics, magnetooptics, catalysis, and metamaterials.

Large-scale numerical examination of a disordered Bose–Hubbard model in two dimensions shows entanglement based signature of many-body localization, providing answers to the challenging questions posed by recent experiments.

Authors unveil how strain precisely tailors octahedral tilts, charge transfer, and orbital–spin reconstruction in LSMO/LCO bilayers, enabling robust interfacial Mn–Co antiferromagnetism and tunable magnetism.

MnBi₂Te₄ has an appealing combination of topological bands and magnetic ordering. While chemical doping with Sb can be used to tune these properties, it typically comes with an increase in defect density. Here, Chen, Wang, Li, Duan, and coauthors demonstrate a defect engineering approach that preserves the topological and magnetic properties of Mn(Bi_1-xSb_x)₂Te₄.

Nonlinear multidimensional spectroscopy that can image the sub-cycle dynamics of strongly correlated systems on the sub-femtosecond timescale is demonstrated by using the carrier–envelope-phase dependence of the correlated multielectron response to decode the complex interplay between different many-body states.

The origin of the nematic state in the kagome metal CsTi₃Bi₅ remains unclear. Here, using polarization-dependent angle-resolved photoelectron spectroscopy and ab initio based field theoretical methods, the authors propose a d-wave nematic order driven by electronic correlations via an orbital-selective mechanism.

Chiral spin liquids, a topological phase in frustrated quantum spin systems, have been recently very sought-after. Here, Bauer et al.present a model for a Mott insulator on the Kagome lattice with broken time-reversal symmetry exhibiting such a topological phase.

The electronic states within domain walls in an interacting electronic system remain elusive. Here, Cho et al. report that the domain wall state in a charge-density-wave insulator 1T-TaS₂ decomposes into two localized but nonconducting states at the center or edges of domain walls.

Photo-excitation in strongly correlated materials is usually modelled as an increase of electronic energy that is then transferred to other degrees of freedom. Contrarily, Novelli et al.show that in a charge-transfer insulator, sub-gap excitation forms electrons that are suddenly dressed by the boson field.

The nature of the excitations in the pseudogap regime and their relation to superconductivity remain core issues in cuprate high-T_c superconductivity. Here, using resonant inelastic x-ray scattering, the authors find that high-energy excitons in optimally-doped Bi₂Sr₂CaCu₂O_8+δ are enhanced by the onset of superconductivity, an effect possibly explained in terms of electron fractionalization.

Electrooxidation of pollutants near or below the thermodynamic hydrogen evolution potential offers transformative opportunities for energy-efficient devices. Here, the authors report amorphous phosphorus-doped CoFe₂O₄ catalysts for stable industrial level low-potential electrooxidation reactions.

Recently the Kondo effect has been observed in transition metal dichalcogenide heterobilayers, but the evidence for low-temperature coherent state has been missing. Wan et al. observe signatures of such state in the form of a split Kondo peak with a characteristic magnetic-field dependence by STM at 340 mK.

Emergent anyonic correlations via spin–charge separation are observed in a one-dimensional strongly interacting quantum gas, enabling the exploration of non-equilibrium anyonic phenomena in a highly controllable setting.

Electron correlations are important for superconductivity in layered copper oxides. Here, the authors use Auger photoelectron coincidence spectroscopy to directly determine the oxygen 2p hole-hole Coulomb energy in the undoped cuprate La₂CuO₄.

The nature of the relationship between the spin-ordered and superconducting states of the cuprates is a longstanding puzzle. X-ray measurements conducted by Guarise et al. suggest that a continuum model rather than overdamped magnon model provides a more complete picture of the spin spectrum of Bi₂Sr₂CaCu₂O_8+δ.

The origin of bad-metal resistivity is a long-standing problem for condensed matter physics. Here the authors show anomalous resistivity, transport lifetime, and relaxation dynamics consistent with bad-metal behavior over a wide range of temperature for fermionic potassium atoms in optical lattices.

The coupling of a quantum system to its environment is usually associated with the unwanted effect of decoherence. But theoretical work shows that with suitably engineered couplings, dissipation can drive a system of cold atoms into desired many-body states and quantum phases.

Understanding the dynamics of cuprates following photoexcitation can provide insights into the complex coupling mechanisms that underlie their exotic equilibrium behaviour. Here the authors use pump-probe reflection spectroscopy to investigate the nonequilibrium spin dynamics of Mott-insulating Nd₂CuO₄.

Quantum simulation with ultracold atomic gases is an established platform for investigating complex quantum processes. Focusing on optical lattice experiments, this Technical Review overviews the available tools and their applications to the simulation of solid-state physics problems.