Nature Communications (Apr 2022)
Quantum spins and hybridization in artificially-constructed chains of magnetic adatoms on a superconductor
Abstract
Previous studies of magnetic adatom chains on superconducting substrates have mostly focused on the regime of dense chains and classical spins. Here, using scanning tunnelling microscopy, the authors study the excitation spectra of Fe chains on a NbSe2 surface, adatom by adatom, in the regime of quantum spins.