Regular Article - Mesoscopic and Nanoscale Systems
Oscillations of photonic heat current through parallel-coupled double circular mesoscopic Josephson junction devices
School of Physics, Beijing Institute of Technology, 100081, Beijing, China
2 School of Physics and new Energy, Xuzhou University of Technology, 221018, Xuzhou, China
Accepted: 21 November 2021
Published online: 2 December 2021
The parallel-coupled double circular mesoscopic Josephson junction devices connecting to two photon reservoirs are investigated, and the time-dependent photonic heat current formula is derived. The time-oscillating structures of heat current are contributed by the superposition of heat current branches with frequencies (). The frequency ratio of field-induced oscillation branches dominates the current evolution structure. The main oscillation wave package can be superposed by multiple resonant peaks as the two frequencies do not match entirely. As magnetic fluxes possess the relation , the dc photonic heat current versus exhibits maximum values with equal height located at , where m, n are integers, and is the flux quantum. The main peaks are split to form multi-peak structure, and the number of split resonant peaks in a period is equal to m. The detailed behavior is intimately ascribed to whether m being odd or even.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021