The sinusoidal dependence on the current on phase difference in its DC version can be derived from the (*) Ginzburg-Landau equation.
The sinusoidal dependence on the current on phase difference in its DC version can be derived from the (*) Ginzburg-Landau equation. Applying a constant voltage across the material results in the AC  version, which gives a current whose frequency is a multiple of the electron charge over Planck's constant.  The operating basis for superconducting quantum interference devices, for 10 points— identify this effect in which current flows between two superconductors separated by an insulating layer.
The sinusoidal dependence on the current on phase difference in its DC version can be derived from the (*) Ginzburg-Landau equation.
Josephson effect