ArticleNature materials2025
Spin excitations in nanographene-based antiferromagnetic spin-1/2 Heisenberg chains.
Article in Nature materials, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.
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Who cites it
18 citing papers in PubMed.
- IntrinsicAdvanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
- Article
- Quantum Spin-1/2 Rings Built From [2]Triangulene Molecular Units.Angewandte Chemie (International ed. in English) · 2026Article
- Air-Stable Luminescent Schlenk Diradical With Triplet Ground State.Angewandte Chemie (International ed. in English) · 2026Article
- π-Conjugation Mediates Competing J12 and J13 Interactions at the Nanometric Scale in Linear Fe(III) Porphyrin Trimers.Inorganic chemistry · 2026Article
- Engineering Ultrastable Intrinsic Radicals: Graphene Quantum Dots With NIR-II Emission for Dynamic Deep-Tissue Bioimaging.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
- Antiferromagnetic Chains in a Monolayer of Molecular Qubits Assembled on Graphene.Small (Weinheim an der Bergstrasse, Germany) · 2026Article
- Metal-Free Ferromagnetism in Triangulene Two-Dimensional Frameworks.Journal of the American Chemical Society · 2026Article
- Magnetic properties of molecules on surfaces studied with scanning probe methods.National science review · 2026Review
- DesignerNational science review · 2026Review
- Deep learning drives autonomous molecular reactions with single-bond selectivity in tetra-brominated porphyrins on Au(111).Nature communications · 2026Article
- TailoringAngewandte Chemie (International ed. in English) · 2025Article
- Magnetic Coupling in Non-Kekulé Diradical Hydrocarbons via Multiconfigurational Pair-Density Functional Theory.Journal of chemical theory and computation · 2025Article
- Frustration-Induced Many-Body Degeneracy in Spin -1/2 Molecular Quantum Rings.Journal of the American Chemical Society · 2025Article
- Spin excitations in nanographene-based antiferromagnetic spin-1/2 Heisenberg chains.Nature materials · 2025Article
- A Route toward the On-Surface Synthesis of Organic Ferromagnetic Quantum Spin Chains.Journal of the American Chemical Society · 2025Article
- Article
- Physics and Chemistry of Two-Dimensional Triangulene-Based Lattices.Accounts of chemical research · 2025Article
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Authors and funding
11 authors.
Funding
Abstract
Antiferromagnetic Heisenberg chains exhibit two distinct types of excitation spectrum: gapped for integer-spin chains and gapless for half-integer-spin chains. However, in finite-length half-integer-spin chains, quantization induces a gap, requiring precise control over sufficiently long chains to study its evolution. Here we create length-controlled spin-1/2 Heisenberg chains by covalently linking Olympicenes-Olympic-ring-shaped magnetic nanographenes. With large exchange interactions, tunable lengths and negligible magnetic anisotropy, this system is ideal for investigating length-dependent spin excitations, probed via inelastic electron tunnelling spectroscopy. We observe a power-law decay of the lowest excitation energy with length L, following a 1/L dependence in the large-L regime, consistent with theory. For L = 50, a V-shaped excitation continuum confirms a gapless behaviour in the thermodynamic limit. Additionally, low-bias current maps reveal the standing wave of a single spinon in odd-numbered chains. Our findings provide evidence for the realization of a one-dimensional analogue of a gapless spin liquid within an artificial graphene lattice.
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Registered trials
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