Self-assembly of magnetic Co atoms on stanene

We have investigated magnetic Co atoms self-assembled on ultraflat stanene Cu(111) substrate by utilizing scanning tunneling microscopy/spectroscopy (STM/STS) in conjunction with density functional theory (DFT). By means of depositing onto the stanene/Cu(111) held at 80 K, developed into monomer, dimer, and trimer structures containing one, two, three atoms, respectively. As per atomically resolved topographic images bias-dependent apparent heights, atomic structure models based Sn substituted been deduced, which are agreement both self-consistent DFT calculations STM simulations. Apart from that, projected states has revealed a maximum around $\ensuremath{-}0.5$ eV Co-3${d}_{3{z}^{2}\ensuremath{-}{r}^{2}}$ minority band, contributes predominately to peak feature about $\ensuremath{-}0.3$ conductance $(dI/dU)$ spectra taken sites. result exchange splitting between $\mathrm{Co}\text{\ensuremath{-}}3d$ majority bands, there nonzero moments, including $0.60{\ensuremath{\mu}}_{B}$ $0.56{\ensuremath{\mu}}_{B}$ $0.29{\ensuremath{\mu}}_{B}$ Co-atom assembly stanene. Such assembly, therefore, could provide vital building blocks stabilize local magnetism two-dimensional nontrivial topological properties.