期刊
PHYSICAL REVIEW LETTERS
卷 126, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.126.017001
关键词
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资金
- Spanish Agencia Estatal de Investigacion
- European Regional Development Fund (ERDF) [PID2019-107338RB-C1, MAT2016-78293-C1]
- European Regional Development Fund (ERDF) (Maria de Maeztu Units of Excellence Program) [MDM-2016-0618]
- European Union (Horizon 2020 FET-Open project SPRING) [863098]
- European Unions Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [844271]
- Slovenian Research Agency (ARRS) [P1-0044]
- Marie Curie Actions (MSCA) [844271] Funding Source: Marie Curie Actions (MSCA)
This letter reports on the generation of coupled YSR states through intramolecular exchange interactions on a molecular platform. Evidence of two distinct interaction channels and the inversion of particle-hole asymmetry across the molecule were found. Numerical calculations show that this asymmetry pattern is caused by two spin-hosting orbitals with opposite potential scattering and strong coupling.
A magnetic impurity on a superconductor induces Yu-Shiba-Rusinov (YSR) bound states, detected by tunneling spectroscopy as long-lived quasiparticle excitations inside the superconducting gap. Coupled YSR states constitute basic elements to engineer artificial superconducting states, but their substrate-mediated interactions are generally weak. In this Letter, we report that intramolecular (Hund's-like) exchange interactions produce coupled YSR states across a molecular platform. We measured YSR spectra along a magnetic iron-porphyrin on Pb(111) and found evidence of two distinct interaction channels, which invert their particle-hole asymmetry across the molecule. Numerical calculations show that the identical YSR asymmetry pattern of the two channels is caused by two spin-hosting orbitals with opposite potential scattering and coupled strongly. Both channels can be similarly excited by tunneling electrons into each orbital, depicting a new scenario for entangled superconducting bound states using molecular platforms.
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