Nature Physics, Published online: 14 April 2026; doi:10.1038/s41567-026-03230-6
Controlling the dynamics of magnons at terahertz frequencies is important for fast and efficient information processing devices. Now optical excitation is shown to enable ultrafast manipulation of magnon spectra in an insulating antiferromagnet.
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- Photoengineering the magnon spectrum in an insulating antiferromagnet
- Lifetime of the singly charged <sup>229</sup>Th nuclear isomerNature Physics, Published online: 14 April 2026; doi:10.1038/s41567-026-03251-1 The isomeric state of thorium-229, a candidate for nuclear clocks, can decay through internal conversion and radiative decays. Now experiments suggest indirect evidence for a higher-order decay process through an electronic transition.
- Intrinsic phononic dressed states in a nanomechanical systemNature Physics, Published online: 14 April 2026; doi:10.1038/s41567-026-03225-3 Exploiting the differences between quantum and classical physics typically requires nonlinear devices. Quantum nonlinear effects have now been demonstrated in a nanomechanical resonator due to strong coupling with an intrinsic two-level defect.
- Capillary Leidenfrost effectNature Physics, Published online: 14 April 2026; doi:10.1038/s41567-026-03255-x If a surface is hot enough, a liquid droplet can develop an insulating vapour layer that makes it levitate above the surface, which is known as the Leidenfrost effect. A solid structure of liquid-filled capillaries is now shown to display this levitating effect at much lower temperatures.
- Detection of atmospheric <sup>42</sup>Ar at the 10<sup>−21</sup> level by atom countingNature Physics, Published online: 14 April 2026; doi:10.1038/s41567-026-03257-9 Argon-42 is a background in experiments that search for dark matter or neutrinoless double-beta decay. Now, the isotope’s abundance is measured by combining a laser-based atom trapping technique with isotope pre-enrichment.
- Wetting beyond equilibriumNature Physics, Published online: 10 April 2026; doi:10.1038/s41567-026-03252-0 Wetting is well understood for equilibrium conditions. Simulations probing wetting by active matter now demonstrate the emergence of stabilizing particle currents and provide the basis for a formalism describing wetting for non-equilibrium systems.
- Metamaterials that learn to change shapeNature Physics, Published online: 07 April 2026; doi:10.1038/s41567-026-03226-2 Physical networks can learn to accomplish tasks on the fly by adjusting their internal parameters. Now it is shown that such physical learning can be achieved in metamaterials that can learn to change shape.
- Double-edged role of interactions in superconducting twisted bilayer grapheneNature Physics, Published online: 07 April 2026; doi:10.1038/s41567-026-03243-1 It is unclear whether the superconducting pairing in moiré graphene is driven primarily by electronic interactions. Now, by tuning the electrostatic environment, the authors show that these interactions may play a crucial role in both mediating the pairing and screening it.
