Abstract
We have studied the power-induced switching of a number of thin film YBa 2Cu 3O 7 (YBCO) coplanar transmission line resonators at 8GHz. Switching occurs at current densities around 10 6 − 10 7 Acm -2 at low T, where it is hysteretic; at higher T it becomes non-hysteretic, and washes out in a narrow temperature range which we believe corresponds to the critical temperature T cj of a single responsible weak link. We develop a thermal model which accounts for all of the observed features of the switching.
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