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Parallel array of YBa2Cu3O7−δ superconducting Josephson vortex-flow transistors with high current gains
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We have developed a Josephson vortex-flow transistor based on a parallel array of 440 YBa2Cu3O7−δ bicrystal grain boundary Josephson junctions. The array's critical current Ic was measured as a function of the control current Ictrl through a control line that is inductively coupled to the array. The device has a highly asymmetric Ic(Ictrl) curve with several regions where a switching behaviour is observed characterized by a maximum current gain gmax = ∂Ic/∂Ictrl of 19 and a significant dynamic range of 20 μA at 77 K. In the range 4.7–92 K gmax versus temperature is non-monotonic with a maximum recorded at 77 K.
Title: Parallel array of YBa2Cu3O7−δ superconducting Josephson vortex-flow transistors with high current gains
Description:
We have developed a Josephson vortex-flow transistor based on a parallel array of 440 YBa2Cu3O7−δ bicrystal grain boundary Josephson junctions.
The array's critical current Ic was measured as a function of the control current Ictrl through a control line that is inductively coupled to the array.
The device has a highly asymmetric Ic(Ictrl) curve with several regions where a switching behaviour is observed characterized by a maximum current gain gmax = ∂Ic/∂Ictrl of 19 and a significant dynamic range of 20 μA at 77 K.
In the range 4.
7–92 K gmax versus temperature is non-monotonic with a maximum recorded at 77 K.
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