Nontrivial Chern Numbers in Three-Terminal Josephson Junctions
Julia S. Meyer, Manuel Houzet
DOI 10.1103/PhysRevLett.119.136807 · Physical Review Letters
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Abstract
Recently, it has been predicted that the Andreev bound state spectrum of four-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 three-terminal geometry.
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