Superconducting Spintronics | Quantum materials and devices group

Conventional superconductivity is mediated by singlet Cooper pairs of electrons which have antiparallel spins.

Conventional superconductivity is mediated by singlet Cooper pairs of electrons which have antiparallel spins. The proximity effect between a superconductor (S) and a ferromagnet (F) tends to strongly suppress superconductivity because the internal exchange field of the latter acts to align electron spins and so destroys pairs. Consequently the critical temperature ( T c ) of a thin superconductor is strongly suppressed by contact with a ferromagnet, and in an F/S/F trilayer (the equivalent of the spintronic spin valve) the T c suppression can be controlled by summing or subtracting the exchan

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