Year: 2024
Type: article
Abstract: Many-body interactions in metal-organic frameworks (MOFs) are fundamental for emergent quantum physics. Unlike their solution counterpart, magnetization at surfaces in low-dimensional analogues is strongly influenced by magnetic anisotropy (MA) induced by the substrate and still not well understood. Here, on-surface coordination chemistry is used to synthesize on Ag(111) and superconducting Pb(111) an iron-based spin chain by using pyrene-4,5,9,10-tetraone (PTO) precursors as ligands. Using low-temperature scanning probe microscopy, their structures and low-energy spin excitations of coordinated Fe atoms are compared with high S = 2 spin-state. Although the chain and coordination centers are identical on both substrates, the long-range spin-spin coupling due to a superexchange through the ligand on Ag is not experimentally observed on Pb(111). This reduction of spin-spin interactions on Pb in tunneling spectra is ascribed to the depletion of electronic states around the Fermi level of the Pb(111) superconductor as compared to silver.
Source: Advanced Science
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $6,517
Funders: National Science Foundation, University of Bern, European Commission, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Swiss Nanoscience Institute, H2020 European Research Council, H2020 Marie Skłodowska-Curie Actions, National Center of Competence in Research Spin Qubit in Silicon
Awards: G1074928753, G1101766131, G3112097622, G3188738659, Ultra-sensitive mechanical dissipation in classical, quantum and non-equilibrium nanocontacts, G3989290152, G434337789, Exploring New Building Blocks for Molecular Electronics: Charged and Excited States of Molecules on Surfaces, Nitrogenated Polycyclic Aromatic Hydrocarbons (N-PAHs): Nanostructures, Functionalization and Electronic Properties (NanoFun), G6048016931, Theoretical investigation of photocatalytic water splitting on surfaces and thin films of perovskite oxynitrides, QUSTEC: international, interdisciplinary and intersectoral doctoral programme in Quantum Science and Technologies, NCCR SPIN: Spin Qubits in Silicon, QUSTEC: international, interdisciplinary and intersectoral doctoral programme in Quantum Science and Technologies, G993971353
OpenAlex ID: W4405761553