2025/04/02 by Mansikkamäki, Olli, Giazotto, Francesco, Balatsky, Alexander · 1 citation
#FOS: Physical sciences #Superconductivity (cond-mat.supr-con)
paper · doi:10.48550/arxiv.2504.01884
A temperature gradient ΔT across a Josephson junction induces a thermoelectric current. We predict the AC Josephson effect is activated when this current surpasses the junction's critical current. Our investigation of this phenomenon employs the time-dependent Ginzburg-Landau theory framework in proximity to the critical temperature. Our results indicate that the frequency of the AC current is approximately given by π S Δ T / (2 Φ0), where S represents the Seebeck coefficient and Φ0 the magnetic flux quantum and we estimate the frequency be on the range of GHz for Sn up to a THz for larger S and Tc materials. Furthermore, we propose two distinct experimental configurations to observe this effect.