Induced topological superconductivity in a BiSbTeSe2-based Josephson junction

Bob De Ronde, Chuan Li, Yingkai Huang, Alexander Brinkman*

*Corresponding author for this work

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Abstract

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 BiSbTeSe2-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.

Original languageEnglish
Article number794
JournalNanomaterials
Volume10
Issue number4
DOIs
Publication statusPublished - 21 Apr 2020

Keywords

  • Josephson junction
  • Majorana mode
  • Topological insulator

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