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Coupled Yu-Shiba-Rusinov states induced by a many-body molecular spin on a superconductor by Rubio-Verdú, Carmen; Zaldívar, Javier; Žitko, Rok; Pascual, Jose Ignacio is a scholarly article available to read on EtoBox.

What is Coupled Yu-Shiba-Rusinov states induced by a many-body molecular spin on a superconductor about?

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.

Author

Rubio-Verdú, Carmen; Zaldívar, Javier; Žitko, Rok; Pascual, Jose Ignacio

Published

2020

Language

EN