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As quantum information and communication experiments grow in sophistication, the need for efficient sources of entangled photons escalates. Using exciton and biexciton emission in GaAs island quantum dots, Ghaliet al. demonstrate the electric field-induced generation of entangled photons with high fidelity.

Spin-pumping- spin current production in a non-magnetic layer adjacent to a magnetic layer- is central to spintronics. Here, the authors separate the spin-pumping signal induced by the inverse spin Hall effect from other effects in (Ga,Mn)As, achieving an accurate measurement of the spin Hall effect.

Controlling magnetic domain wall motion in nanowires requires a thorough knowledge of the depinning mechanisms. Here, the authors show that current-induced intrinsic depinning has a different energy barrier than magnetic field-induced extrinsic depinning, and succeed in quantifying the respective barriers.

Realizing stable, room-temperature magnetic skyrmions that can be moved along current is challenging. Here, the authors observe skyrmion bubbles in a synthetic antiferromagnetic coupled multilayer at room temperature and demonstrate its current-induced motion free from the skyrmion Hall effect.

Antiferromagnet/ferromagnet bilayers are shown to exhibit large enough spin–orbit torque to switch the magnetization of the ferromagnetic layer without the application of external magnetic fields.

The control and manipulation of the magnetization of thin metallic films by means of an electric current is a promising strategy for ensuring that potential spintronic applications are energy efficient. It is now shown that large changes in the current-induced magnetic field can arise as a result of varying the thickness of the Ta layer in Ta|CoFeB|MgO heterostructures.

Spin torque oscillators (STOs) are attractive potential alternative for many high frequency applications, due to their small area and CMOS compatibility. Here, Sharma et al succeed in the electrical synchronization of four STOs, and use their setup to demonstrate wireless and battery-free energy harvesting using eight STOs.

Spin-orbit torque can drive switching in ferromagnets, and therefore can be used for the electrical writing of magnetic bits. Here, Yoon et al. take this essential idea a step further, demonstrating mutual switching, where a ferromagnet can drive switching in an antiferromagnet, switching the sign of the spin-orbit torque itself.

It is unclear how ingested botulinum neurotoxin invades the host to cause illness. Here, the authors show that the toxin complex containing neurotoxin, hemagglutinin (HA), and NTNHA proteins traverses the epithelial barrier via HA-glycoprotein 2 interaction and endocytosis by Peyer’s patch microfold cells.

The transition from a ferromagnetic to a paramagnetic state is observed directly as the density of carriers that mediate spin–spin coupling is varied. The measurement was performed on thin films of GaMnAs and was made possible by superconducting quantum interference devices (SQUIDS).

Sensitive spin rectifier devices can be used to create rectennas that harvest ambient radiofrequency signals between –62 and –20 dBm, and can be used to create on-chip co-planar-waveguide-based spin rectifier arrays with large zero-bias sensitivity and high efficiency.

Manipulation of the quantum-metric structure to produce topological phenomena has rarely been studied. Now, flexible control of the quantum-metric structure is demonstrated in a topological chiral antiferromagnet at room temperature.

Designing energy-efficient and scalable hardware capable of accelerating Monte Carlo algorithms is highly desirable for probabilistic computing. Here, Singh et al. combine stochastic magnetic tunnel junction-based probabilistic bits with versatile field programmable gate arrays to achieve this goa

Myopic maculopathy is a complication of myopia that often progresses to blindness. Here, in a genome-wide association study, Hosoda et al. find that rs11873439 intronic to CCDC102B is associated with myopic maculopathy, but not with myopia, thus representing a risk factor independent of myopia.

In the non-collinear antiferromagnet Mn₃Sn, a spin–orbit torque makes the collective octupole moment and individual moments rotate in opposite directions, leading to a sign-reversed switching polarity compared with collinear magnets.

Myopia is a significant and increasing public health concern. Here Miyake et al. conduct a genome-wide association study and identify WNT7Bas a susceptibility gene across different ethnic groups, suggesting a possible role in the development of myopia.

The Dzyaloshinskii–Moriya interaction can be harnessed to generate chiral magnetic structures for spintronic applications. Here, the authors show that changing the heavy-metal layer adjacent to an ultrathin magnetic layer can influence the strength and sign of this interaction.

Despite low transition temperatures, ferromagnetism in diluted magnetic semiconductors has been essential in exploring new ideas and concepts in spintronics, some of which have been successfully transferred to metallic ferromagnets.

There has been much interest in using the probabilistic switching of magnetic tunnel junctions in unconventional computing, but to do so requires a detailed understanding of this switching. Here, Funatsu et al rigorously determine the switching exponents in superparamagnetic tunnel junctions.

This allows versatile non-volatile tuning of the mutual synchronization of chains of up to four oscillators and provides a path toward individual oscillator control in large oscillatory arrays.

Current-induced rotation in epitaxial films of the non-collinear antiferromagnet Mn₃Sn is investigated.

Spin Hall nano-oscillators can be tuned via magnetic fields and the drive current, but individual oscillator control in large arrays remains a challenge. Here, the authors provide individual control of the threshold current and the auto-oscillation frequency by voltage-controlled magnetic anisotropy.

Activation of innate immune responses by nucleic acids is crucial to protective and pathological immunities. This activation is known to be mediated by transmembrane Toll-like receptors and cytosolic receptors; however, it remains unclear whether a mechanism exists that integrates these two nucleic-acid-sensing systems. High-mobility group box (HMGB) proteins 1, 2 and 3 are now shown to function as universal sentinels for nucleic-acid-mediated innate immune responses.

Free-electron lasers can produce powerful pulses of radiation at very short wavelengths, even in the hard-X-ray region. In general, however, they comprise facilities several kilometres in length. A 55-m-long laser could open up the technology to a broader range of researchers.

Mammalian genomes are scattered with repetitive sequences, but their biology remains largely elusive. Here, the authors show that transcription can initiate from short tandem repetitive sequences, and that genetic variants linked to human diseases are preferentially found at repeats with high transcription initiation level.

A probabilistic computer utilizing probabilistic bits, or p-bits, is implemented with stochastic nanomagnetic devices in a neural-network-inspired electrical circuit operating at room temperature and demonstrates integer factorization up to 945.

This Review discusses the field of antiferromagnetic spintronics with a focus on coherent effects.

This Review discusses recent advances towards electric-field control of magnetism in ferromagnetic semiconductors and metals, and in multiferroics.

Spin-transfer torque is the rotation that a spin-polarized current induces on the magnetization of the solid it flows through. The way in which currents generate torques in a wide variety of magnetic materials and structures is discussed in this Review, as well as recent state-of-the-art demonstrations of current-induced-torque devices that show great promise for enhancing the functionality of semiconductor devices.