Can a solid be a superfluid? Engineering a novel supersolid state from layered 2D materials
https://phys.org/news/2023-03-solid-superfluid-supersolid-state-layered.html "rigid crystal flows without friction, all belong to 1 quantum state... supersolid simultaneously has 2 orders, superconductor (super: particles can flow without resistance) and solid (spatially repeating pattern of particles)... 2D) semiconductor structure 2 conducting layers (1 doped with negatively-charged electrons and other with positively-charged holes) separated by insulating barrier... supersolid pre-empts non-super exciton solid... non-super exciton wins, and quantum coherence collapses" Related: Dynamics of molecular rotors in bulk superfluid helium https://phys.org/news/2023-07-dynamics-molecular-rotors-bulk-superfluid.html Concave, umbrella-like metal complexes provide space for giant molecular rotors to operate in solid state https://phys.org/news/2023-09-concave-umbrella-like-metal-complexes-space.html