Spin Excitations of High Spin Iron(II) in Metal-Organic Chains on Metal and Superconductor
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arXiv
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| Auteurs principaux: | , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866916768221495296 |
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| author | Liu, Jung-Ching Li, Chao Chahib, Outhmane Wang, Xing Rothenbühler, Simon Häner, Robert Decurtins, Silvio Aschauer, Ulrich Liu, Shi-Xia Meyer, Ernst Pawlak, Rémy |
| author_facet | Liu, Jung-Ching Li, Chao Chahib, Outhmane Wang, Xing Rothenbühler, Simon Häner, Robert Decurtins, Silvio Aschauer, Ulrich Liu, Shi-Xia Meyer, Ernst Pawlak, Rémy |
| contents | Many-body interactions in metal-organic frameworks are fundamental for emergent quantum physics. Unlike their solution counterpart, magnetization at surfaces in low-dimensional analogues is strongly influenced by magnetic anisotropy induced by the substrate and still not well understood. Here, we use on-surface coordination chemistry to synthesize on Ag(111) and superconducting Pb(111) an iron-based spin chain by using pyrene-4,5,9,10-tetraone precursors as ligands. Using low-temperature scanning probe microscopy, we compare their structures and low-energy spin excitations of coordinated Fe atoms 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 observed on Ag is absent on Pb(111). We ascribe this reduction of spin-spin interactions on Pb to the depletion of electronic states around the Fermi level in the Pb(111) superconductor as compared to silver. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_20312 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spin Excitations of High Spin Iron(II) in Metal-Organic Chains on Metal and Superconductor Liu, Jung-Ching Li, Chao Chahib, Outhmane Wang, Xing Rothenbühler, Simon Häner, Robert Decurtins, Silvio Aschauer, Ulrich Liu, Shi-Xia Meyer, Ernst Pawlak, Rémy Materials Science Superconductivity Many-body interactions in metal-organic frameworks are fundamental for emergent quantum physics. Unlike their solution counterpart, magnetization at surfaces in low-dimensional analogues is strongly influenced by magnetic anisotropy induced by the substrate and still not well understood. Here, we use on-surface coordination chemistry to synthesize on Ag(111) and superconducting Pb(111) an iron-based spin chain by using pyrene-4,5,9,10-tetraone precursors as ligands. Using low-temperature scanning probe microscopy, we compare their structures and low-energy spin excitations of coordinated Fe atoms 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 observed on Ag is absent on Pb(111). We ascribe this reduction of spin-spin interactions on Pb to the depletion of electronic states around the Fermi level in the Pb(111) superconductor as compared to silver. |
| title | Spin Excitations of High Spin Iron(II) in Metal-Organic Chains on Metal and Superconductor |
| topic | Materials Science Superconductivity |
| url | https://arxiv.org/abs/2409.20312 |