Collapse of Thermal Activation in Moderately Damped Josephson Junctions
Collapse of Thermal Activation in Moderately Damped Josephson Junctions
We study switching current statistics in moderately damped Nb-InAs-Nb and intrinsic Bi2Sr2CaCu2O8+delta) Josephson junctions. A paradoxical collapse of thermal activation with increasing temperature is reported and explained by the interplay of two conflicting consequences of thermal fluctuations, which can both assist in premature escape and help in retrapping back into …