Table 1 The comparison of the charge and spin superconductors.
The charge superconductor | The spin superconductor | |
|---|---|---|
Current carrier | Charge | Spin |
Basic phenomenon | Zero electric resistance | Zero spin resistance |
Meissner effect | Against the magnetic field | Against the variation of the electric field |
The first GL equations |
|
|
The second GL equations |
| ρ=−∇·(js × α0s), where |
London equations |
|
|
GL coherence length ξ |
|
|
Penetration depth λ |
| Difficult to define |
GL parameter κ |
| Difficult to define |
DC Josephson effect | DC electric current through the Josephson junction | DC spin current through the Josephson junction |
AC Josephson effect | The difference between the electric fields on both sides of the junction induces the AC electric current | The difference between the magnetic fields on both sides of the junction induces the AC spin current |
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