Josephson junction

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Related to Josephson junctions: Josephson effect, Josephson tunneling

Josephson junction

[′jō·səf·sən ‚jəŋk·shən]
(cryogenics)
A thin insulator separating two superconducting materials; it displays the Josephson effect.

Josephson Junction

(electronics)
A type of electronic circuit capable of switching at very high speeds when operated at temperatures approaching absolute zero. The low power dissipation of a Josepshson Junction makes it useful in high density computer circuits.

Josephson junction

An ultra-fast switching technology that uses superconductor materials, originally conceived by Brian Josephson. Circuits are immersed in liquid helium to obtain near-absolute zero degrees required for operation. Switching takes place in a few picoseconds. Although Josephson junctions have not materialized for computer circuits, they have been used thus far in medical instruments that sense brain waves.
References in periodicals archive ?
A Josephson crystal can be realized by a Josephson junction chain, formed by repeating a single junction or SQUID in space to form a one-dimensional ladder structure.
When multiple domains exist, gradients between domains of differing phase [phi] are accompanied by currents that tunnel between the domains as the spaces between the domains form Josephson junctions [14].
Benz and his coworkers, for example, take advantage of phase locking to ensure that large arrays of superconducting Josephson junctions display voltage oscillations of a well-defined frequency, despite small differences among the individual components.
In order to synchronize the signal, Argonne physicist Alexei Koshelev suggested that the stacks of Josephson junctions should be shaped into resonant cavities, which visiting scientist Lufti Ozyuzer of the Izmir Institute of Technology, Turkey, and graduate student Cihan Kurter then fashioned.
Earlier efforts to develop a computer using superconducting Josephson junctions failed, partly because the researchers--following standard practice in semiconductors--chose to encode binary data as high and low voltages,.
In these seven papers contributors describe their research in facets of Josephson junctions, including progress in fabrication techniques for circuits of small capacitance, the order parameter symmetry of unconventional superconductors by Josephson effects, annular Josephson tunnel junctions that monitor causal horizons, non-equilibrium phase diagrams of current-driven arrays, Josephson vortex behavior in certain superconducting ceramics under a low frequency magnetic field, thermomagnetic shock waves in the vortex stage of Type-II superconductors and finite temperature effects on the quantum phase transition in disordered d-wave superconductors.
In the late 1960s, the relationship between voltage and frequency was measured precisely with newly discovered superconductor devices called Josephson junctions.
8-picosecond, single-flux-quantum (SFQ) voltage pulses in YBCO Josephson junctions.
Now researchers have found that a single crystal of a copperoxide superconductor can by itself act as a set of Josephson junctions, R.
Through Hamilton's work, the Josephson junction array voltage standard became a robust superconductor integrated circuit containing about 20,000 Josephson junctions and remains the most complex superconducting circuit in practical use today.
This is a significant milestone toward creating lumped arrays of Josephson junctions for ac voltage standards.