| 摘要 |
PURPOSE:To control zero voltage currents by small injection currents, and to obtain control having high stability by holding an insulator or a semiconductor between superconductors and forming a normal conductive injection electrode consisting of a normal conductive metal. CONSTITUTION:Since a normal conductive metal is used as a normal conductive injection electrode 12, the quantum mechanical proximity effect of the normal conductive metal is added thereto. The proximity effect represents the state in which the quantum mechanical wave motion of the normal conductive metal penetrates up to the inside of a superconductor 1 and a superconducting wave motion in the superconductor 1 is weakened partially because the normal conductive metal as the normal conductive injection electrode 12 is brought into contact with a superconducting metal as the superconductor 1 through a thin insulator 3. Accordingly, since the effect of quasiparticle injection and the proximity effect are multiplied synergistically, injection currents as control currents may be reduced, and the variation of zero voltage currents to the fluctuation of injection currents is minimized, thus bringing the state difficult to be affected by the alteration of injection currents. |
