Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 26: Focus Session: Engineered Magnetic Impurities: Interaction and Superconductivity

TT 26.5: Hauptvortrag

Dienstag, 8. März 2016, 11:45–12:15, H20

Magnetic adatoms on superconductors - a new venue for Majorana bound states? — •Felix von Oppen — Dahlem Center for Complex Quantum Systems & Fachbereich Physik, Freie Universität Berlin

In a recent experiment, Nadj-Perge et al.[1] (see also [2]) provide possible evidence for Majorana bound states in chains of magnetic adatoms on conventional superconductors. The formation of topological superconductivity in this system relies on ferromagnetic order of the magnetic moments and spin-orbit coupling provided by the substrate superconductor. In this talk, I will discuss the physical picture underlying this experiment, including an explanation of the unexpectedly strong localization of the observed end states [3,4], and will suggest additional experiments to probe the Majorana end states [5].

[1] S. Nadj-Perge et al., Science 346, 602 (2014)

[2] M. Ruby, F. Pientka, Y. Peng, F. von Oppen, B. W. Heinrich,

K. J. Franke, arXiv:1507.03104 (2015); to appear in PRL

[3] F. Pientka, L. I. Glazman, F. von Oppen, PRB 88, 155420 (2013)

[4] Y. Peng, F. Pientka, L. I. Glazman, F. von Oppen,

PRL 114, 106801 (2015)

[5] Y. Peng, F. Pientka, Y. Vinkler-Aviv, L. I. Glazman, F. von Oppen,

arXiv:1506.06763 (2015)