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Spin-based electronics offers significantly improved efficiency, but a major challenge is the electric manipulation of spin. Here, Powalla et al find a large gate induced spinpolarization in graphene/WTe2 heterostructures, illustrating the potential of such heterostructures for spintronics.

Magnetotransport signature of topological semimetal states has been observed but restricted at very low temperature. Here, Zhanget al. report magnetic field-modulated chiral charge pumping and valley diffusion in Cd₃As₂up to room temperature.

There is a trade-off between achieving fast qubit control and preserving long qubit lifetimes. In this work, the authors demonstrate single qubit gates by driving a transmon qubit parametrically at 1/3 of its frequency, creating fast, high-fidelity gates while protecting the qubit lifetime and mitigating heating.

Optical absorption and nonlinear index are important performance drivers in devices like microcombs. Here the authors use resonance-enhanced nonlinear spectroscopy to characterize absorption limits and nonlinear index for some integrated photonic materials.

The quantum aspect of soliton microcomb from an integrated silicon carbide microresonator is studied in several regimes — below threshold, above threshold and in the soliton regime — using a single-photon optical spectrum analyser for second-order photon correlation measurement.

Time-resolved measurements show that current-induced magnetization switching in ferrimagnetic devices is faster and more energy-efficient than in ferromagnet devices.

Femtosecond laser pulses allow for extremely fast switching of magnetization in ferromagnetic films, but all examples so far contained gadolinium. Here the authors demonstrate room temperature all-optical toggle switching in a ferrimagnetic manganese-based half-metal without gadolinium.

Altermagnets combine spin-split electronic bands with zero net magnetization, making them ideal for integration into spin-based information processing devices. Here Guo, Chen, Zeng, and coauthors demonstrate a magnetic memory making use of the altermagnetic spin splitting torque in a three terminal MRAM device.

Photonic crystal microresonators permit precise control of nonlinear optical processes. By suppressing specific parasitic processes, they enable the efficient and robust generation of single-mode squeezed vacuum states of light.

In superconducting circuits, the nonlinearity of Josephson junctions mediates photon interactions, but they are typically dominated by two-photon processes. Here the authors observe multi-photon interactions in a superconducting circuit with Cooper-pair pairing, revealing a new regime of microwave quantum optics.

The application of d.c. fields across p–i–n junctions in silicon ridge waveguides leads to crystal symmetry breaking. This induces a second-order optical nonlinear susceptibility that enables phase-only modulation and second-harmonic generation with an efficiency of ∼13% W^–1 at 2.29 µm.

The layered structure of van der Waals materials leads to highly anisotropic thermal conductivity, due to the van der Waals gap between the layers. Here, Da̧browski et al show how this anisotropic heat transport can be harnessed for ultrafast, optically-induced control of magnetism in Cr₂Ge₂Te₆.

Domain walls in ferromagnetic–oxide structures can be moved using an electric field, which could be useful for low-power electronic devices. Here, the authors demonstrate the modulation of the velocity of these domain walls between a creep and a flow regime.

The intrinsic Kerr nonlinearity in ring resonators is exploited to demonstrate passive isolation of a continuous-wave laser. Up to 35-dB isolation with 5-dB insertion loss was achieved on-chip.

Researcher demonstrate the line-by-line pulse shaping of frequency combs generated in silicon nitride ring resonators, and observe two distinct paths to comb formation that exhibit strikingly different time domain behaviours.

Chip-based frequency combs promise many applications, but full integration requires the electrical pump source and the microresonator to be on the same chip. Here, the authors show such integration of a microcomb with < 100 GHz mode spacing without additional filtering cavities or on-chip heaters.

Scanning nitrogen-vacancy microscopy unveils super-moiré spin textures emerging in twisted double-bilayer CrI₃ and provides real-space evidence of antiferromagnetic Néel-type skyrmions spanning multiple moiré cells.

Ferromagnetic semiconductors that have the critical properties of semiconductors and ferromagnetism at room temperature have so far proven elusive. Here, by doping black phosphorus with Cobalt, Fu, Qu, Hou, Chang and coauthors induce ferromagnetism that persists up to room temperature, all while maintaining black phosphorus’ semiconducting properties.

The methanol-to-hydrocarbons reaction on zeolites produces olefins from many sources, but catalyst stability is a major challenge. Here, by combining operando measurements and simulations, the formation and identification of deactivating carbonaceous species throughout the reaction are achieved.

When an antiferromagnet is in close proximity to a ferromagnet, the antiferromagnet pins the spins of the ferromagnet, resulting in an exchange bias effect. This effect has been instrumental in the development of a variety of spintronic devices. Here, Haung et al. use pressure to tune the exchange bias effect in all van der Waals heterostructure composed of FePSe₃/Fe₃GeTe₂.

Frequency combs have revolutionized the study of electronic structures and dynamics of matter but currently used lasers systems are limited in terms of achievable pulse energies. Here, Pronin et al.demonstrate few cycle pulse emission from a thin-disk laser with 150 nJ pulse energy and 7.7 fs pulse duration.

Wave destabilization is demonstrated in semiconductor ring lasers operating at low pumping levels, where ultrafast gain recovery leads to the emergence of a frequency comb regime owing to phase turbulence.

While the spin generation in topological insulators is well studied, little is known about the interaction of the spins with external stimuli. Here, Seifert et al. observe a helical, bias-dependent photoconductance at the lateral edges of topological Bi₂Te₂Se platelets for perpendicular incidence of light, distinct to common longitudinal photoconductance phenomena.

Here the authors demonstrate an on-demand generation of perfect soliton crystal using synthesized potential field. The individual solitons can also be controlled, for example oscillate around their equilibrium position, by the external field.

The Landé factors govern all the spin-related basic phenomena and are the key parameters which guide spintronics applications. Here, Kirstein et al. demonstrate a universal dependence of the Landé factors on the bandgap energy of several perovskite materials.

Neuromorphic computing processes data faster and with less energy than electronics. Here, authors demonstrate a reconfigurable photonic reservoir computer that performs multiple machine learning tasks in parallel at ultrafast rates while using extremely low energy per operation.

Free-running stable optical dissipative solitons, called Nozaki–Bekki solitons, are created in a ring semiconductor laser; their spontaneous formation with tuning of laser bias eliminates the need for an external optical pump.

This work creates a magnon-photon interface from a 2D magnetic semiconductor metasurface. It demonstrates both the static and ultrafast control of exciton polaritons with spins and coherent magnons, paving the way for spin-based photonic devices.

Synthetic dimensions can introduce band properties without a periodic structure in real space, but they have largely been studied in linear systems. A study using an optical resonator has now shown non-linear soliton states in synthetic frequency space.

This research explores Thouless pumping of quadratic solitons in materials that are periodically modulated in both transverse and longitudinal directions. After one cycle of longitudinal modulation, the center of a soliton either does not shift or shifts in the transverse direction by an integer number of transverse lattice periods, with the direction of motion controlled by the topological properties of the refractive index landscape.

Graphene is the archetype for realizing two-dimensional topological phases of matter. Here, the authors introduce a new topological classification connected to polarization transport, where the topological number is revealed in the spatiotemporal dispersion of the susceptibility tensor.

The controlled motion of magnetic domain walls in nanowire conduits forms the basis of emerging memory and information processing devices. Here, the authors report a pulse-length dependent quasi-static velocity of current-driven chiral domain walls, showing that their inertia is tunable.

The authors mapped spontaneous and choice activity across mouse prefrontal cortex. The activity maps aligned with intrinsic connectivity rather than anatomical subregions, suggesting that connectivity, not cytoarchitecture, organizes prefrontal function.

Terahertz control of polar skyrmions—topological textures of electric dipoles—is key for fast optoelectronics. Now, ultrafast excitation of polar skyrmions is achieved across two orders of magnitude of temperature in an oxide heterostructure.

The perpendicular Néel order in a collinear antiferromagnetic insulator—chromium oxide—can be switched by 180° via the spin–orbit torque with a low current density of 5.8 × 10⁶ A cm⁻² and read out via the anomalous Hall effect.

Applications of spontaneous symmetry breaking are hindered by unavoidable imperfections. Here, the authors reveal how a phase defect provides topological robustness to this process, enabling a bias free realization without fine tuning of parameters.

Broadband coherent light sources are crucial for numerous applications, such as imaging and spectroscopy. Using filamentation of mid-infrared laser pulses in bulk crystals, Silvaet al. generate supercontinuum spectra over three octaves, from 4.5 μm to 450 nm, with carrier-envelope phase stability.

Magnetic type-II Weyl semimetals host a variety of intriguing physical phenomena due to the combination of magnetic ordering and the electronic properties of the Weyl nodes. Herein, the authors explore the ultrafast spin dynamics of the magnetic Weyl semimetal, Co₃Sn₂S₂, observing a transient enhanced magnetization as a result of laser excitation.

There has been considerable interest in using magnons for information processing. Such ‘magnonic’ devices will require magnetic patterning analogous to the lithographic patterns of integrated circuits. Here, Levati, Vitali and coauthors present one possible approach to this, demonstrating laser induced changes in the perpendicular magnetic anisotropy of Yttrium Iron Garnet.

Squeezed and entangled light are necessary for quantum information applications. Here, working towards the practical application of such schemes, Boulier and colleagues demonstrate the generation of squeezed light from exciton-polaritons in a semiconductor micropillar.

Light can provide ultrafast ways of spin manipulation in magnetic materials, but existing methods are limited by long thermal recovery or low temperature. Here, the authors demonstrate ultrafast spin precession via optical charge-transfer processes in exchange-coupled Fe/CoO at room temperature.

The lowest-frequency gravitational wave background may be shaped by supermassive black hole binaries that scatter nearby stars or dark matter. In this case, the NANOGrav 15-year dataset favours dense galactic centres with 10⁶ solar masses per cubic parsec.