James T. Farmer

Sep 22, 2023 | link.aps.org | Bassel Heiba Elfeky |William Strickland |Jaewoo Lee |James T. Farmer

Popular Summary Standard Josephson tunnel junctions, formed by two superconducting layers sandwiching a nm-thick insulating barrier, conduct current through the tunneling of Cooper pairs. Current in a Josephson junction based on indium arsenide, however, is carried by coherent reflections of normal electrons and holes at the two interfaces forming Andreev bound states.