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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.

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.

Dirac semimetals have been proposed as parent materials for other topologically non-trivial phases such as Weyl semimetals, achieved by the breaking of time reversal symmetry. Here the authors use transport measurements to evidence such behaviour in single crystal Cd₃As₂under an applied magnetic field.

Understanding and controlling the quantum friction remain challenging. Here, the authors reveal pseudo-Landau levels splitting induced quantum friction at solid-solid interfaces via engineering the nanocurvature geometry of folded graphene edges.

In two-dimensional electron systems, strong Coulomb interactions lead to the formation of new phases. Here the authors observe a transition between two of these correlated phases, a composite fermion liquid and Wigner solid, in a zinc oxide heterostructure.

Electron-electron interactions in many-body systems may manifest themselves through the fractional quantum Hall effect. Here, the authors perform transport measurements in bilayer graphene, and observe particle-hole symmetric fractional quantum Hall states in theN=2 Landau level.

For small twist angles, electrons can resonantly tunnel between graphene layers in a van der Waals heterostructure. It is now shown that the tunnelling not only preserves energy and momentum, but also the chirality of electronic states.

Artificial magnetic fields have been meticulously engineered in a 3D acoustic crystal, facilitating the creation of 3D flat bands through Landau quantization of quasiparticles arising from nodal-ring band degeneracies.

How the carriers behave in a Weyl semimetal if they occupy the lowest Landau level remains elusive. Here, the authors report evidences of electrons occupying zeroth chiral Landau levels with distinct linear dispersion behaviors for two inequivalent Weyl nodes in a Weyl semimetal NbAs.

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.

Landau-Zener transitions near an avoided level crossing are a broadly relevant concept in quantum systems. Here the authors use a superconducting flux qubit to shed new light on the role of the environment in Landau-Zener tunneling by observing a crossover between weak and strong coupling.

SQUID-on-tip tomographic imaging of Landau levels in magic-angle graphene provides nanoscale maps of local twist-angle disorder and shows that its properties are fundamentally different from common types of disorder.

Using torque magnetometry, the thermodynamic signatures of bosonic Landau level transitions are observed in a layered superconductor, owing to the formation of Cooper pairs with finite momentum.

The band structure of solid state systems can exhibit linear like dispersions resembling the Dirac equation in high-energy physics; however, the crystal structure anisotropy typically associated with solid state systems can lead to deviations from the symmetry of the original equation. Here, using Landau level spectroscopy, the authors report experimental evidence for isotropic fermions in 3D crystal structure of LaAlSi.

The Bloch–Siegert shift—a strong-field phenomenon that implies a failure of the rotating-wave approximation—is observed in the polariton dispersion diagram of a two-dimensional electron gas system inside a high-Q terahertz photonic crystal cavity.

Stimulated Raman scattering is one of the methods being explored to generate ultrahigh intensity short laser pulses. Depierreux et al. explore a new regime, also relevant to inertial confinement thermonuclear fusion, in which nonlinear kinetic response of a hot plasma enhances Raman amplification.

New fractional quantum Hall states are observed in a higher Landau level in graphene. Calculations indicate that a non-Abelian parton state is the most likely candidate state, which has implications for topological quantum computation.

Two-dimensional electron systems at half-filled Landau levels can form unusual electronic states such as paired fractional quantum Hall and nematic phases. Here the authors observe the transition between these two phases at filling factors 5/2 and 7/2 and demonstrate the important influence of interactions.

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.

Various fractional quantum Hall phases are observed in a new generation of bilayer-graphene-based van der Waals heterostructures, including an even-denominator state predicted to harbour non-Abelian anyons.

A phase of strongly interacting electrons that has a spontaneous dipole moment is seen for the first time using an approach that images the electron's wavefunction through interference at an impurity.

The electrons associated with the conducting surface states of topological insulators are described by a two-component wavefunction. Experiments on Bi₂Se₃ now show that the structure of Landau levels reflects this two-component nature.

The authors present an experimental framework for achieving photonic Landau quantization, and present the quantized distribution of photonic states across different Landau levels in a two-dimensional Kagome metal lattice. They experimentally observe that the electric field distribution is localized according to the positional attributes of different Landau levels.

The authors design potassium sodium niobate-based ceramics exhibiting highly symmetrical bipolar strain and high electrostrain coefficient (~2000 pm/V) under a low driving electric field of 8.4 kV/cm through A-site defect engineering and charge compensation.

Materials in large magnetic fields can be driven into the quantum limit, where electrons occupy only the lowest Landau level and the response is determined by interactions. Here the authors go beyond this limit by emptying one or two of bismuth’s electronic valleys, depending on the field direction.

Quantum oscillations serve as an important probe of electronic structure of quantum materials. Yang et al. study quantum oscillations in the electronic specific heat of natural graphite, unveiling a double-peak structure absent in commonly used theory, and show its utility in determining the Landé g-factors.

The manuscript reports on the experimental observation of a Lifshitz transition in a topological insulator HfTe₅ subject to a strong magnetic field, which results in the formation of topological one-dimensional Weyl modes in the bulk of a three-dimensional material.

A scanning single-electron transistor is used to probe the strain dependence of moiré and supermoiré domains. It is observed that these can be considered nearly independent of each other.

The authors reveal distinct atomic-scale mechanisms underlying phase boundary engineering formation and explain the different electrical properties of two (K, Na)NbO₃ based materials with the similar phase boundary, providing a new mechanistic insight.

The effect of disorder in conventional two-dimensional electron systems is usually described in terms of individual electrons interacting with an underlying disorder potential. Scanning single-electron transistor measurements of graphene in a strong magnetic field indicate that in this system, coulombic interactions between electrons must also be taken into account.

While the electronic quality of graphene has significantly improved during the last two decades, charged defects inside encapsulating crystals still limit its performance. Here, the authors overcome this limitation and report the enhanced electronic quality of graphene enabled by tuneable Coulomb screening inside large-angle twisted bilayer and trilayer graphene devices, showing Landau quantization at magnetic fields down to ~5 mT.

Examples of materials with non-trivial band topology in the presence of strong electron correlations are rare. Now it is shown that quantum fluctuations near a quantum phase transition can promote topological phases in a heavy-fermion compound.

Coherent spin waves—quantized into magnons—can be emitted as Cherenkov radiation, but their experimental realization is hindered by the lack of fast-moving magnetic perturbations. Now, a picosecond strain pulse is shown to induce this effect.

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

Magnetic heliknotons are hopfions embedded in helical spin backgrounds. Current-induced nucleation and Hall-effect-free motion of isolated magnetic heliknotons is demonstrated in the chiral magnet FeGe.

Conventional ammonia synthesis is energy intensive. Here the authors explore the mechanism of light-driven ammonia synthesis through in situ spectroscopy and modelling, and demonstrate that certain AuRu plasmonic alloys are promising catalysts for this potentially more sustainable process.

Recent work has expanded the concept of altermagnets to non-collinear magnetic materials. Here, Hu et al extend this further to non-collinear chiral materials, determining altermagnetic multipolar order parameters and predicting that such materials host large spin-hall and Edelstein effects.

It has been predicted that the presence of strong electronic correlations may generate new phases in materials with topologically non-trivial band structure. Here, the authors demonstrate the generation of Dirac mass in the correlated Dirac semimetal candidate ZrTe₅under high magnetic fields.

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.

CrPS₄, a 2D van der Waals A-type antiferromagnet, is shown to exhibit ideal characteristics of Stoner–Wohlfarth antiferromagnets, such as ferromagnet-like binary switching rather than layer-by-layer flipping as in other 2D A-type antiferromagnets.

Authors reveal microstructural origin of enhanced dielectric energy storage and develop a framework directly relating local inhomogeneity to dielectric properties. The results offer insights into understanding complex relaxor ferroelectrics.

Radiation reaction (RR) on particles in strong fields is the subject of intense experimental research, but previous efforts lacked statistical significance due to the extreme regimes required. Here, the authors report a 5σ observation of RR and obtain strong, quantitative evidence favouring quantum models over classical, using an all-optical setup where electrons are accelerated by a laser in a gas jet before colliding with a second, intense pulse.

Chorus waves are crucial on radiation belt dynamics in the space of magnetized planets. Here, the authors show that initially excited single-band chorus waves can quickly accelerate medium energy electrons, and divide the anisotropic electrons into low and high energy components, which subsequently excite two-band chorus waves.