Theoretical
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Nanotechnology
‘Twisted’ 2D materials exhibit unexpected electronic behavior that defies theoretical predictions
This photo shows first author Giovanna Feraco (Zernike Institute for Advanced Materials, University of Groningen, Netherlands) operating an ultra-high vacuum (UHV) system at the synchrotron facility. Credit: University of Groningen In search of new materials that will enable more efficient electronics, scientists are researching so-called 2D materials. These are sheets just one atom thick and can have all sorts of…
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Chemistry
Theoretical framework reveals how reaction conditions tune catalyst selectivity
Schematic representation of the theoretical framework: Starting with a computational model of the prepared catalyst, scientists use density functional theory calculations and kinetic modeling to map phase changes under different reaction conditions. This approach allows you to discover how reaction conditions affect the active phase of a catalyst and how reaction conditions can be used to influence catalyst performance. Credit:…
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Nanotechnology
Theoretical physicists reveal how twisting layers of material creates mysterious electron path deflection effects
(Left) Atomic force microscopy image showing a sample of twisted layers of WS2 (a material made of tungsten and sulfur). Scale bar represents 4 micrometers (4 millionths of a meter). (Right) Diagram showing how to measure the Hall effect (lateral voltage) in twisted materials. The red arrow represents the path of the electron, and V0 and VH are the voltages…
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Physics
Theoretical physicists develop method to model the central theory of quantum gravity in the lab
Illustration of the theory used to model quantum gravity: The lattice simulates a curved space-time. Near the boundary, the lattice becomes denser due to the curvature. Interacting electrical signals in the bulk (yellow, red, and blue lines) simulate the gravitational dynamics. The dynamics in the bulk and at the outer boundary correspond to each other. They are consistent with the…
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