GoKawiilMolecular spin chains show length-dependent coupling to superconductors
Researchers built chains of spin-1 triangulene molecules on a superconducting Au(111)/Nb(110) surface and measured their behavior with scanning tunnelling spectroscopy. They found that chains with an odd number of units develop in-gap Yu-Shiba-Rusinov states tied to a collective spin-1 ground state, while even-length chains settle into a spin-0 state that stays decoupled from the superconductor.