Supporting Information for Role of the magnetic anisotropy in atomic-spin sensing of 1D molecular chains

Abstract

One-dimensional metal-organic chains often possess a complex magnetic\nstructure susceptible to be modified by a alteration of their chemical\ncomposition. The possibility to tune their magnetic properties provides an\ninteresting playground to explore quasiparticle interactions in low-dimensional\nsystems. Despite the great effort invested so far, a detailed understanding of\nthe interactions governing the electronic and magnetic properties of the\nlow-dimensional systems is still incomplete. One of the reasons is the limited\nability to characterize their magnetic properties at the atomic scale. Here, we\nprovide a comprehensive study of the magnetic properties of metal-organic\none-dimensional (1D) coordination polymers consisting of\n2,5-diamino-1,4-benzoquinonediimine ligands coordinated with Co or Cr atoms\nsynthesized in ultra-high vacuum conditions on a Au(111) surface. A combination\nof an integral X-ray spectroscopy with local-probe inelastic electron tunneling\nspectroscopy corroborated by multiplet analysis, density functional theory, and\ninelastic electron tunneling simulations enable us to obtain essential\ninformation about their magnetic structure, including the spin magnitude and\norientation at the magnetic atoms, as well as the magnetic anisotropy.\n