Topic
Materials whose electronic, magnetic, or superconducting properties arise from collective quantum effects, including 2D and layered compounds.
NIMS researchers found vortices in an ultrathin superconductor move over 1,000 times more easily along one-atom-high steps than across them. Temperature and magnetic field tune the effect, and MANA says it could eventually help build lower-energy superconducting electronics.
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UChicago PME researchers published a framework in Physical Review Letters that models the full optical cycle of spin defects, including internal conversion. In a silicon carbide divacancy it found a substantial, previously overlooked contribution to the triplet lifetime.
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ORNL researchers say their AI worked more than 25 hours without a human operator to assemble a 37-molecule artificial graphene lattice. The result puts software in charge of the physical moves inside an experiment, at a pace of about 1.5 molecules an hour.
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UT Dallas and Harvard physicists report in Nature a twisted superlattice in uranium oxytelluride, a compound known since the 1960s. Its mix of ferromagnetic and antiferromagnetic traits might one day help memory devices, if those advantages can be harnessed.
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University of Twente researchers built a SQUID sensor on a silicon pyramid tip that still works above 1 tesla, about 20,000 times Earth's field. Etching the tip from silicon could let labs make these sensors in batches instead of by hand.
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In PNAS, Kyle Shen's Cornell group dosed thin films with cesium and measured them without regrowing the sample, and the dome tracked imperfections in the crystal lattice more closely than the electron count.
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Screening the Coulomb interaction killed superconductivity in magic-angle graphene outright, which is strong evidence that the electrons do the pairing. It killed the correlated insulators too, narrowing the mechanism debate but not settling it.
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Rice, Minnesota and Paul Scherrer researchers report spin textures consistent with unconventional magnetism in ruthenium dioxide films a few atomic layers thick, and only when the lattice is strained, which makes strain a candidate control knob.
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Researchers report the first case of engineered vacuum fluctuations raising NbSe2's transition temperature. The gain is small; the frequency dependence is the part worth arguing about.
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MIT physicists report that two charge density waves in erbium tritelluride form by different mechanisms: one gradual, one nucleating in expanding pockets. Coexisting phases are not one knob.
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A group reports in Nature Physics that selenium core-level dynamics in 1T-TiSe2 speed up with laser fluence. The result that matters is the assay, not a verdict on excitonic insulators.
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