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Open AccessArticle

Induced Topological Superconductivity in a BiSbTeSe2-Based Josephson Junction

1
MESA+ Institute for Nanotechnology, University of Twente, 7522 NB Enschede, The Netherlands
2
Van der Waals–Zeeman Institute, IoP, University of Amsterdam, 1098 XH Amsterdam, The Netherlands
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(4), 794; https://doi.org/10.3390/nano10040794
Received: 3 March 2020 / Revised: 13 April 2020 / Accepted: 14 April 2020 / Published: 21 April 2020
(This article belongs to the Special Issue Superconductivity in Nanoscaled Systems)
A 4 π -periodic supercurrent through a Josephson junction can be a consequence of the presence of Majorana bound states. A systematic study of the radio frequency response for several temperatures and frequencies yields a concrete protocol for examining the 4 π -periodic contribution to the supercurrent. This work also reports the observation of a 4 π -periodic contribution to the supercurrent in BiSbTeSe 2 -based Josephson junctions. As a response to irradiation by radio frequency waves, the junctions showed an absence of the first Shapiro step. At high irradiation power, a qualitative correspondence to a model including a 4 π -periodic component to the supercurrent is found. View Full-Text
Keywords: Topological insulator; Josephson junction; Majorana mode Topological insulator; Josephson junction; Majorana mode
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MDPI and ACS Style

de Ronde, B.; Li, C.; Huang, Y.; Brinkman, A. Induced Topological Superconductivity in a BiSbTeSe2-Based Josephson Junction. Nanomaterials 2020, 10, 794.

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