Tunneling processes into localized subgap states in superconductors

Autor:	Ruby, Michael, Pientka, Falko, Peng, Yang, von Oppen, Felix, Heinrich, Benjamin W., Franke, Katharina J.
Rok vydání:	2015
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity
Zdroj:	Phys. Rev. Lett. 115, 087001 (2015)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.115.087001
Popis:	We combine scanning-tunneling-spectroscopy experiments probing magnetic impurities on a superconducting surface with a theoretical analysis of the tunneling processes between (superconducting) tip and substrate. We show that the current is carried by single-electron tunneling at large tip-substrate distances and Andreev reflections at smaller distances. The single-electron current requires relaxation processes between the impurity-induced Shiba bound state and the quasiparticle continuum, allowing us to extract information on such relaxation processes from our analysis. Comment: 4+ pages, 3 figures; supplementary material: 18 pages, 9 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1502.05048 Zobrazit plný text záznamu View this record from Arxiv