Phase-engineering the Andreev band structure of a three-terminal Josephson junction.

ABSTRACT: In hybrid Josephson junctions with three or more superconducting terminals coupled to a semiconducting region, Andreev bound states may form unconventional energy band structures, or Andreev matter, which are engineered by controlling superconducting phase differences. Here we report tunnelling spectroscopy measurements of three-terminal Josephson junctions realised in an InAs/Al heterostructure. The three terminals are connected to form two loops, enabling independent control over two phase differences and access to a synthetic Andreev band structure in the two-dimensional phase space. Our results demonstrate a phase-controlled Andreev molecule, originating from two discrete Andreev levels that spatially overlap and hybridise. Signatures of hybridisation are observed in the form of avoide

SUBMITTER: Coraiola M 

PROVIDER: S-EPMC10600130 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature