Topic
Atomically thin semiconductors such as WSe2 and MoSe2, often encapsulated in boron nitride and electrostatically gated to host correlated electronic states.
UChicago researchers grew millimeter-wide bismuth telluride films of uniform thickness and say spectra show a 2D topological insulator. Lossless edge conduction, the reason anyone wants the material, is still described as an aim.
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Brescia physicists built a wide-field microscope that uses ultrashort laser pulses to map electron interactions over femtoseconds. They propose it for finding flaws that limit solar cells and LEDs, but so far it has been shown on a single device a few atomic layers thick.
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Rice-led physicists simulated autferroic switches flipping over 400,000 times a second, up from under 100, to generate true random bits. The gain exists only in modeling, against slow magnetic switches, so the case for security chips waits on a material someone can make.
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Physicists mapped the electronic topology of 8,872 atomically thin materials and named over 1,600 twisting candidates in two Science papers. The lists are calculations that tell labs where to look, and testing them in twisted devices comes next.
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Yingying Chen and colleagues report a hybrid stack whose excitons either travel or stay localised depending on the applied voltage. The same voltage sets valley polarisation low or high, and the layers need no careful twist-angle engineering.
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Researchers at four institutions report in Nature Physics that 1,550-nm circular pulses dress a graphene strip into a transient Floquet state, and a 775-nm field sets the direction of the current that flows out.
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The Drexel lab that made the first MXenes in 2011 has grown them by chemical vapor deposition, with Penn and Murata Manufacturing as collaborators, skipping the MAX-phase precursor and the acid bath that has limited their use.
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MoOCl2 is metallic along one crystal axis and dielectric along the perpendicular one, and an Okayama-led team used that split to measure a dielectric quality factor of 45.3 in nanodisks on gold, about 5.7 times the plasmonic mode's.
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For nearly twenty years, triangular pores in hexagonal boron nitride were credited to the electron beam. A Vienna group ran the irradiation in ultra-high vacuum instead, got circles, and then dialled the triangles back in with a little oxygen.
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An Amsterdam group reports it can put a tungsten disulphide monolayer exactly where it wants it, with near-unity yield. The limits worth watching are the 140 C melt step and the millimetre of usable area.
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An ARC Center of Excellence team let its simulations leave the flat geometry, got rippled and sideways-shifted layers, and found X-ray scattering from real samples consistent with them. Phosphorus and nickel predictions moved with the structure.
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Overpotential is the part of a CO2 electrolyser's electricity bill that buys no product, and a computational screen from IIT Gandhinagar says three five-metal boride sheets may not need any of it, though those sheets so far exist only in the calculation.
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Electrons frozen into a lattice inside a tungsten diselenide monolayer turn out to vibrate, and the light used to look at them comes back carrying those vibrations. That makes the ordered phase something an optical bench can measure.
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