Coupled Yu-Shiba-Rusinov states induced by a many-body molecular spin on a superconductor
| Autor: | Rubio-Verdú, Carmen, Zaldívar, Javier, Žitko, Rok, Pascual, Jose Ignacio |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 126, 017001 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.126.017001 |
| Popis: | 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 paper, 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 evidences of two orbital 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. Comment: 6 pages, 5 figures, This document is the Author's version of an Accepted Work, copyright American Physical Society |
| Databáze: | arXiv |
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