Quantum Spin-Engineering in On-Surface Molecular Ferrimagnets
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866910664330575872 |
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| author | Huang, Wantong Stark, Máté Greule, Paul Au-Yeung, Kwan Ho Sostina, Daria Gálvez, José Reina Sürgers, Christoph Wernsdorfer, Wolfgang Wolf, Christoph Willke, Philip |
| author_facet | Huang, Wantong Stark, Máté Greule, Paul Au-Yeung, Kwan Ho Sostina, Daria Gálvez, José Reina Sürgers, Christoph Wernsdorfer, Wolfgang Wolf, Christoph Willke, Philip |
| contents | The design and control of atomic-scale spin structures constitute major challenges for spin-based quantum technology platforms, including quantum dots, color centers, and molecular spins. Here, we showcase a strategy for designing the quantum properties of molecular spin qubits by combining tip-assisted on-surface assembly with electron spin resonance scanning tunneling microscopy (ESR-STM): We fabricate magnetic dimer complexes that consist of an iron phthalocyanine (FePc) molecule and an organometallic half-sandwich complex formed by the FePc ligand and an attached iron atom, Fe(C6H6). The total complex forms a mixed-spin (1/2,1) quantum ferrimagnet with a well-separated correlated ground state doublet, which we utilize for coherent control. As a result of the correlation, the quantum ferrimagnet shows an improved spin lifetime (>1.5 $μ$s) as it is partially protected against inelastic electron scattering. Lastly, the ferrimagnet units also enable intermolecular coupling, that can be used to realize both ferromagnetic or antiferromagnetic structures. Thus, quantum ferrimagnets provide a versatile platform to improve coherent control in general and to study complex magnetic interactions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_18563 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quantum Spin-Engineering in On-Surface Molecular Ferrimagnets Huang, Wantong Stark, Máté Greule, Paul Au-Yeung, Kwan Ho Sostina, Daria Gálvez, José Reina Sürgers, Christoph Wernsdorfer, Wolfgang Wolf, Christoph Willke, Philip Mesoscale and Nanoscale Physics The design and control of atomic-scale spin structures constitute major challenges for spin-based quantum technology platforms, including quantum dots, color centers, and molecular spins. Here, we showcase a strategy for designing the quantum properties of molecular spin qubits by combining tip-assisted on-surface assembly with electron spin resonance scanning tunneling microscopy (ESR-STM): We fabricate magnetic dimer complexes that consist of an iron phthalocyanine (FePc) molecule and an organometallic half-sandwich complex formed by the FePc ligand and an attached iron atom, Fe(C6H6). The total complex forms a mixed-spin (1/2,1) quantum ferrimagnet with a well-separated correlated ground state doublet, which we utilize for coherent control. As a result of the correlation, the quantum ferrimagnet shows an improved spin lifetime (>1.5 $μ$s) as it is partially protected against inelastic electron scattering. Lastly, the ferrimagnet units also enable intermolecular coupling, that can be used to realize both ferromagnetic or antiferromagnetic structures. Thus, quantum ferrimagnets provide a versatile platform to improve coherent control in general and to study complex magnetic interactions. |
| title | Quantum Spin-Engineering in On-Surface Molecular Ferrimagnets |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2410.18563 |