ELECTRIC-FIELD EFFECT ON THE CRITICAL-CURRENT OF SNS CONTACT

The effect of electric field on the critical current of SNS contact is studied in the framework of Ginzburg-Landau theory. We show that elec tric field can significantly enlarge the critical current of the conta ct. ?This effect is especially strong when the temperature of the samp le is close to the superconducting transition temperature of normal la yer T-cn. The electric field effect depends on film thickness: the thi cker the film the weaker the effect. Nevertheless, it can be significa nt for a thick film when the temperature is close to T-cn. The coopera tive effect of electric and magnetic fields is also studied.