Non-trivial Chern numbers in three-terminal Josephson junctions
classification
❄️ cond-mat.mes-hall
cond-mat.supr-con
keywords
chernjosephsonjunctionsnumberssingularitiesterminaltopologicaltransitions
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Recently it has been predicted that the Andreev bound state spectrum of 4-terminal Josephson junctions may possess zero-energy Weyl singularities. Using one superconducting phase as a control parameter, these singularities are associated with topological transitions between time-reversal symmetry broken phases with different Chern numbers. Here we show that such topological transitions may also be tuned with a magnetic flux through the junction area in a 3-terminal geometry.
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