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Processing silk through a molecular bonding design and scalable coupling reagent-assisted dip-coating method can lead to subambient daytime radiative cooling.
So far, only conventional field emitters based on a bulk W needle have achieved atomic resolution in electron microscopy. Here, through the integration of a passive collimator structure and micromanipulation-based alignment of the support needle, a LaB6 nanowire emitter yields stable emission under moderate vacuum conditions and allows for atomic-resolution images and high energy resolution.
Magnon-mediated angular-momentum flow in antiferromagnets may become a design element for energy-efficient, low-dissipation and high-speed spintronic devices. Here, terahertz emission measurements in magnetic multilayers unveil a superluminal-like magnon velocity of ~650 km s–1 in the antiferromagnetic insulator NiO at nanoscale distances.
Moiré trions are observed in electrostatically gated WSe2/MoSe2 heterobilayers, where photoluminescence polarization switching reveals a competition between valley-flip and spin-flip relaxation pathways of photo-excited carriers during trion formation.
Spatiotemporal thermoelectric microscopy enables the observation of electronic heat flow in graphene in diffusive and hydrodynamic regimes at room temperature, as well as a controlled transition from a Fermi liquid to Dirac fluid.
Measuring the gate capacitance serves as a probe of the correlated states in MoSe2/WS2 moiré superlattices, which can be further controlled via sample–gate coupling.
Optical spectroscopy can identify chiral indices of individual carbon nanotubes, but has so far been unable to determine their handedness because of the weak chiroptical signal. Rayleigh scattering circular dichroism now enables the identification of both chiral indices and handedness of individual nanotubes.
Optomechanical effects enable the realization of optical metavehicles that can be manoeuvred across a surface in plane-wave illumination and steered by incident polarization.
Continuous-time data representation and frequency multiplexing enable the implementation of a scalable massively parallel computing scheme in a nanoscale crossbar array for applications in intelligent edge devices.
Nonlinear responses in transport measurements can unveil specific material properties not accessible with linear measurements. In thick Td-MoTe2 samples, a third-order nonlinear Hall effect dominates over lower-order contributions and is linked to the Berry-connection polarizability tensor.
The application of stimulated-emission depletion (STED) microscopy for deep-tissue imaging in the near-infrared optical window is challenged by high cellular autofluorescence. Here the authors present a lanthanide nanoprobe whose electronic configuration enables long-term STED imaging with reduced background noise.
Among the candidates for large-scale quantum computing devices, silicon-based spin qubits offer an outstanding nanofabrication capability for scaling-up. In an array of three spin qubits in silicon, high-fidelity state preparation and control enable the creation of a three-qubit Greenberger–Horne–Zeilinger state with 88% state fidelity.
MoS2/hBN/graphene van der Waals heterostructures with a clean interface and optimized barrier height and gate coupling ratio enable the realization of ultrafast non-volatile flash memory.
In situ electrostatic control of two-dimensional superconductivity is commonly limited due to large charge carrier densities. Now, by means of local gates, electrostatic gating can define a Josephson junction in a magic-angle twisted bilayer graphene device, a single-crystal material.
While two-dimensional semiconductors enable the investigation of light–matter interactions in low dimensions, a link to magnetic order has so far remained elusive. Now, the antiferromagnetic insulator NiPS3 is found to exhibit excitons with strong linear polarization that are coupled to the zigzag antiferromagnetic order.
The resonance of highly doping lanthanide ions in NaYF4 nanocrystals enhances the permittivity and polarizability of nanocrystals, leading to enhanced optical trapping forces by orders of magnitude, bypassing the trapping requirement of refractive index mismatch.