University researchers have developed Josephson junctions and superconducting tunneling devices based on copper-oxide high-transition-temperature superconductors (HTS), and methods to fabricate the same. The invention presents very high-quality all-HTS Josephson superconducting tunnel junctions, arrays and superconducting quantum interference devices created by using a focused beam of helium ions to direct-write insulating barriers into YBa2Cu3O7−δ (YBCO) thin films. The invention’s technique allows tuning of the tunneling junction characteristics and enables reproducible production of superconducting tunneling devices which can operate at easily accessible temperatures. The invention has potential for far reaching impact on applications of superconducting electronics, from highly sensitive magnetometers for biomagnetic measurements of the human body, to large scale arrays for wideband satellite communications.
|United States Of America||Issued Patent||10,224,475||03/05/2019||2014-265|
|United States Of America||Published Application||2019/028817||09/19/2019||2014-265|
HTS, high temperature supeconductors, YBCO, Josephson Junction, superconducting electronics, focused ion beam