Search

In the standard model of particle physics the permanent electric dipole moment of particles is zero, although competing theories suggest it must exist to explain the asymmetry of matter and antimatter in the Universe. The design and synthesis of a new multiferroic material may now enable us to search for the electric dipole moment of electrons with unprecedented precision.

Direct dark matter searches need to take into account whether the total observation time is lower than the characteristic coherence time of the DM field. Analysing this generally overlooked scenario, here the authors quantify the impact on DM limits of the stochastic nature of the virialised ultralight field.

A thermal Casimir force—an attraction between two metal surfaces caused by thermal, rather than quantum, fluctuations in the electromagnetic field—has now been identified experimentally between a flat and a spherical gold plate.

Cuprate superconductors show critical temperatures over 100 K, below which current flows without resistance. Here, the authors show how this temperature is set by material chemistry, leading to a reinterpretation of the cuprate phase diagram and suggestions of how to raise this temperature in the future.

Interferometric detection schemes exploit phase-sensitive combination of spatially separated observation to increase sensitivity. Here, the authors combine data from two atomic comagnetometers separated by 860 km to improve limits on axion-like particles across nine orders of magnitude of mass range.

Resonant magnetic excitations are common in unconventional superconductors, but the mechanism for their formation is elusive. Using inelastic neutron scattering, this study finds similar excitations in the non-superconducting heavy-fermion metal CeB₆, suggesting common behaviour between the two ground states.

What makes the phonons in cuprates become chiral, as measured by their thermal Hall effect, is an unresolved question. Here, the authors rule out two extrinsic mechanisms and argue that chirality comes from a coupling of acoustic phonons to the intrinsic excitations of the CuO₂ planes.

Hot-electron effects in graphene can be used to detect terahertz radiation at room temperature with high sensitivity, low noise-equivalent power and a fast response time.

The measurement of the total cross-section of proton–proton collisions is of fundamental importance for particle physics. Here, the first measurement of the inelastic cross-section is presented for proton–proton collisions at an energy of 7 teraelectronvolts using the ATLAS detector at the Large Hadron Collider.

The goal of quantum simulation is to probe many-body phenomena in controlled systems, but Fermi-Hubbard phenomena are typically hard to simulate in cold atomic. Here, the authors simulate them with subsurface dopants in silicon, achieving a low effective temperature and reading out spin states with STM.

For solid state qubits, silicon MOS structures offer great scalability, while hole spins promise high performance qubit operation. Liles et al. have combined these two features in a planar silicon quantum dot device that operates as an artificial atom down to the single-hole limit.

Thermal transport measurements show that there is a thermal Hall effect in the out-of-plane direction in two cuprates in the pseudogap regime. This indicates that phonons are carrying the heat and that they have a handedness of unknown origin.