Researchers at Rice University have found an alloy of copper, vanadium, and sulfur that forms crystals that, due to quantum effects, can trap electrons. This can produce flat bands, which have been observed in 2D crystals previously. The team’s results are the first case of a 3D crystal with that property.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/02/07/metal-crystal-stops-electrons/