Search

Superconductivity in twisted bilayer WSe₂ evolves smoothly with twist angle and emerges near Fermi surface reconstruction, linking previously distinct phase diagrams and clarifying its correlated origin.

Androgen activity in the male embryonic hindbrain prolongs hindbrain differentiation in male individuals and drives sex differences in the incidence and prognosis of posterior fossa type A (PFA) ependymoma, an aggressive childhood brain tumour.

Mechanisms for generating spin-polarized currents may be helpful for applications. Now one such mechanism that uses the unusual Landau-level spectrum of WSe₂ under a strong magnetic field is demonstrated.

Exchange bias, where an adjacent antiferromagnet leads to an offset magnetization loop in a ferromagnet is a critical effect in magnetic memory devices. Here, Pellet-Mary et al introduce a “lateral exchange bias”, allowing control of the Neel vector in bilayer samples of CrSBr via laterally adjacent odd layered segments.

A new platform making use of hexagonal boron nitride interfaced with the molecular superconductor κ-(BEDT-TTF)₂Cu[N(CN)₂]Br is demonstrated for realizing cavity-altered materials, confirmed by magnetic force microscopy and nano-optical measurements.

Heterostructures of graphene and hexagonal boron nitride have great potential for high-mobility electronics, yet little is known about the electronic interaction between these two atomically thin materials. Here, the authors perform angle-resolved reflected-electron spectroscopy to unveil their interplay.

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.

The nature of correlated insulator states commonly observed in moiré superlattices are still under investigation. Here, the authors use pump-probe spectroscopy to study the dynamics of correlated insulator states in a WSe₂/WS₂ moiré heterostructure at two different fillings, elucidating distinct time-domain signatures associated with these states.

We report superconductivity, in a limited region of displacement field and density, in 5.0° twisted bilayer WSe₂ with a maximum critical temperature of 426 mK, establishing that moiré flat-band superconductivity extends beyond graphene structures.

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.

Dielectric patterning allows tunable anisotropy in high-mobility one-dimensional graphene electrostatic superlattices.

Naturally occurring 2H-stacked bilayer WSe₂ enables the observation of exciton condensates in the strong coupling limit.

The authors demonstrate a graphene/CrSBr heterostructure exhibiting anisotropic surface plasmon polariton (SPP) propagation in the mid-infrared and terahertz range. Charge transfer at the interface directs SPPs along the quasi-1D chains that compose each CrSBr layer, with propagation lengths varying by an order of magnitude between the two in-plane crystallographic axes.

Through inelastic light scattering chiral spin-2 long-wavelength magnetorotons are observed, revealing chiral graviton modes in fractional quantum Hall states and aiding in understanding the quantum metric impacts in topological correlated systems.

The authors use angle-resolved photoemission spectroscopy (ARPES) and scanning tunneling microscopy (STM) to study the charge density wave (CDW) in the kagome material ScV₆Sn₆. The ARPES data shows minimal changes to the electronic structure in the CDW state, while STM quasiparticle interference measurements imply a strong reconstruction of the electronic structure in the CDW state.

Compressibility measurements on high-quality monolayer WSe₂ samples enable the observation of fractional quantum Hall states in the lowest Landau levels.

Pressure-induced changes in the magnetic order of bilayer and trilayer van der Waals crystals are revealed and attributed to changes in the stacking arrangement.

Engineering multiple moiré patterns within a boron nitride–graphene–boron nitride heterostructure enables tunable crystal symmetry and strong modification of the graphene band structure.

Assessment of surface contamination shows that trace oxygen is a key factor influencing the trajectory and quality of graphene grown by low-pressure chemical vapour deposition, with oxygen-free synthesis showing increased reproducibility and quality.

Transport measurements on twisted bilayer graphene show that a large linear-in-temperature increase in resistivity exists for many twist angles. This may have implications for the mechanism of superconductivity in this material.

We present comprehensive thermodynamic and spectroscopic evidence for an antiferromagnetically ordered heavy-fermion ground state in the van der Waals metal CeSiI.

Hyperbolic exciton polaritons (HEPs) are anisotropic light-matter excitations with promising applications, but their steady-state observation is challenging. Here, the authors report experimental evidence of HEPs in a van der Waals magnet, CrSBr, via cryogenic infrared near-field microscopy.

Researchers created a periodically poled van der Waals semiconductor (3R-MoS₂) and achieved a macroscopic frequency conversion efficiency of 0.03% over a thickness of 3.4 μm. The quasi-phase-matched second harmonic signal surpasses the usual quadratic enhancement by 50% and broadband generation of photon pairs at telecom wavelength is demonstrated with a coincidence-to-accidental ratio of 638 ± 75.

A ferromagnetic transition in CrSBr is attributed to ordering of magnetic defects, and can be electrostatically manipulated.

Large, bilayer graphene single crystals can be grown by oxygen-activated chemical vapour deposition.

Excitons in the electronvolts range are found to couple strongly to coherent magnons in hundreds of microelectronvolts in an atomically thin two-dimensional antiferromagnetic semiconductor.

A new superlattice fabrication process on 2D material heterostructures enables the observation of replica Dirac cones in graphene as well as Hofstadter’s fractal magnetic spectrum under triangular and square superlattice symmetries.

Measurements of the chemical potential in a monolayer of WSe₂ using a single electron transistor sensing scheme allows for the exact mapping of the level spacing of Landau levels of monolayer WSe₂ in the conductance and valence bands.

Tuberous Sclerosis Complex (TSC) is caused by TSC1 or TSC2 mutations, leading to hyperactivation of mechanistic target of rapamycin complex 1 (mTORC1) and tumors in multiple organs. Here, the authors show that TFEB is the primary driver of renal disease and mTORC1 hyperactivation in TSC.

Predicting properties at the interface of materials is crucial for advanced materials design. Here, the authors introduce a high-throughput computational framework, InterMatch, for predicting several properties of an interface by using the databases of individual bulk materials.

Here, a combined experiment-theory framework based on different nano-imaging techniques and first-principle calculations is used to analyse the shapes of moiré patterns in twisted van der Waals structures, enabling an accurate description of the coupling between the atomically thin layers.

The discover of van der Waals materials that retain magnetic ordering down to monolayers has fostered considerable interest, however, these materials are often hampered by poor environmental stability. Here, Tschudin, Broadway and coauthors study the magnetic properties of CrSBr, using NV-center based magnetometry, detailing magnetization reversal under applied magnetic fields

The authors show a hysteretic behaviour of superconductivity as a function of electric field in bilayer Td-MoTe₂, representing observations of coupled ferroelectricity and superconductivity.

Tunable correlated states are observed in twist bilayer WSe₂ over a range of twist angles, with signatures of superconductivity for a twist of 5.1°.

The broken-symmetry edge states that are the hallmark of the quantum Hall effect in graphene have eluded spatial measurements. Here, the authors spatially map the quantum Hall broken-symmetry edge states using atomic force microscopy and show a gapped ground state proceeding from the bulk through to the quantum Hall edge boundary.

Stacking a monolayer and bilayer of graphene, with a small twist angle between them, creates a tunable platform where the physics of both twisted bilayer graphene and twisted double bilayer graphene can be realized.

Metal-to-insulator transitions are characterized in twisted WSe, revealing strange metal behaviour and quantum criticality at low temperatures.

Odd-denominator fractional quantum Hall states are routinely observed in high-mobility gallium arsenide heterostructures. Now, a 5/2 state has been observed in an oxide heterostructure — an unexpected state in an unexpected material.

Interlayer hybridization in 2D van der Waals materials can change their properties. Here, it is shown that the coupling in CrSBr can be changed from switching the magnetic order from antiferromagnetic to ferromagnetic states.

In moiré materials, structural relaxation phenomena can lead to unexpected and novel material properties. Here, the authors characterize an unconventional non-local relaxation process in twisted double trilayer graphene, in which an energy gain in one domain of the moiré lattice is paid for by a relaxation that occurs in the other.

Using lineage tracing and molecular profiling, Abate-Shen and colleagues identify a Ras and Myc co-activation signature that predicts metastasis and castration resistance in localized prostate cancer.

Strongly interacting bosons have been predicted to display a transition into a superfluid ground state, similar to Bose–Einstein condensation. This effect is now observed in a double bilayer graphene structure, with excitons as the bosonic particles.

Employing an oxidation-activated charge transfer strategy to oxidize transition-metal dichalcogenides into transition-metal oxides, the authors imprint plasmonic cavities with laterally abrupt doping profiles and nanoscale precision demonstrating plasmonic whispering-gallery resonators.

For appropriately aligned layers of different two-dimensional materials, the separation between layers—and hence the interlayer coupling—is very sensitive to pressure, leading to pressure-induced changes in the electronic properties of the heterostructures.

Scanning tunnelling spectroscopy is used to map the atomic-scale electronic structure of magic-angle twisted bilayer graphene, finding multiple signatures of electron correlations and thus providing insight into the sought-after mechanism behind superconductivity in graphene.

An electromechanical response to an out-of-plane electric field in van der Waals heterostructures enables direct visualization of moiré superlattices using piezoresponse force microscopy.

The identification of superconductivity and strong interactions in twisted bilayer 2D materials prompted many questions about the interplay of these phenomena. This Perspective presents the status of the field and the urgent issues for future study.