Strong magnetic exchange coupling of a dibenzo-fused rhomboidal nanographene and its homocoupling with tunable periodicities on a metal surface
Source abstract
Abstract
Open-shell nanographenes (NGs), also known as molecular π-magnets, have recently garnered attention for their potential in spintronics and quantum computing. Tailoring of such NGs at the atomic level allows the control of their magnetic interactions. We report here the on-surface synthesis of a dibenzo-fused rhomboidal NG with predominant zigzag edges featuring an open-shell (antiferromagnetic) character and a high value of magnetic exchange coupling (MEC) on Au(111) surfaces. Scanning tunneling microscopy (STM) and noncontact atomic force microscopy (nc-AFM) confirm its chemical structure. Scanning tunneling spectroscopy (STS) measurements, complemented by state-of-the-art theoretical calculations, reveal the open-shell character of the NG, observed as singlet-triplet inelastic excitations. Furthermore, molecular chains consisting of these NGs were fabricated with tunable periodicities through the functionalization of the precursor, showing the absence of MEC between adjacent units, which provides deeper insights into the behavior of open-shell systems and preservation of individual magnetic entities within π-conjugated structures.
Source: openalex_inverted_index · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Graphene research and applications · Quantum and electron transport phenomena · Molecular Junctions and Nanostructures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
IMDEA Nanoscience, C/Faraday 9, Campus de Cantoblanco, 28049 Madrid, Spain
Organic and Carbon Nanomaterials Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa 904-0495, Japan
Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Prague 2, CZ-12116, Czech Republic
Institute of Physics of the Czech Academy of Science, Cukrovarnická 10, 16200 Prague 6, Czech Republic
Instituto de Ciencia de Materiales de Madrid (ICMM), CSIC, Cantoblanco, 28049 Madrid, Spain
Unidad de Nanomateriales avanzados, Imdea Nanoscience, Unidad asociada al CSIC por el ICMM, 28049 Madrid, Spain
Funding
Comunidad de Madrid · European Commission · Ministerio de Ciencia, Innovación y Universidades · Ministerio de Economía y Competitividad · Okinawa Institute of Science and Technology Graduate University · Japan Society for the Promotion of Science · Akademie Věd České Republiky · Ministerstvo Školství, Mládeže a Tělovýchovy · Grantová Agentura České Republiky
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