Journal
NANOMATERIALS
Volume 10, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/nano10040794
Keywords
Topological insulator; Josephson junction; Majorana mode
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Funding
- European Research Council (ERC)
- Netherlands Organization for Scientific Research (NWO) [680-47-463]
- COST project Nanoscale coherent hybrid devices for superconducting quantum technologies Action [CA16218]
- VICI grant
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A 4 pi-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 pi-periodic contribution to the supercurrent. This work also reports the observation of a 4 pi-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 pi-periodic component to the supercurrent is found.
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