Collaboration work on theory of gate-controlled superconductivity
A new mechanism is proposed to explain the observation of gate-controlled superconductivity reported in recent works. The theoretical model shows that magnetic impurities on the superconductor surface can assist pair breaking under an electric field.
Using the quasiclassical Green's function method, in this paper we show that a small concentration of magnetic impurities at the surface of a superconducting constriction can significantly help the suppression of superconductivity when a gate field is applied to the same nanoconstriction. Further details are available in the article published in Physical Review B.