We study quasi-one dimensional wires of two-band superconductors driven by an electrical current. We find that the onset of dissipation can occur with the nucleation of time-connected phase slips (t-PS). The topological structure of the t-PS consists of two phase slips (one in each order parameter) separated in time and connected via an interband vortex string along the time direction. This shows as a two-peak structure in voltage vs. time. We discuss the conditions for observing t-PS, depending on the interband coupling strength and the relaxation time scales for each order parameter.
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Domı́nguez et al. (2024) studied this question.
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