Electron and Cooper-pair transport across a single magnetic molecule explored with a scanning tunneling microscope

J. Brand*, S. Gozdzik, N. Néel, J. L. Lado, J. Fernández-Rossier, J. Kröger

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)

Abstract

A scanning tunneling microscope is used to explore the evolution of electron and Cooper-pair transport across single Mn-phthalocyanine molecules adsorbed on Pb(111) from tunneling to contact ranges. Normal-metal as well as superconducting tips give rise to a gradual transition of the Bardeen-Cooper-Schrieffer energy gap in the tunneling range into a zero-energy resonance close to and at contact. Supporting transport calculations show that in the normal-metal-superconductor junctions this resonance reflects the merging of in-gap Yu-Shiba-Rusinov states as well as the onset of Andreev reflection. For the superconductor-superconductor contacts, the zero-energy resonance is rationalized in terms of a finite Josephson current that is carried by phase-dependent Andreev and Yu-Shiba-Rusinov levels.

Original languageEnglish
Article number195429
JournalPhysical Review B
Volume97
Issue number19
DOIs
Publication statusPublished - 17 May 2018
MoE publication typeA1 Journal article-refereed

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