Berlin 2018 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 34: Superconductivity: Tunneling and Josephson Junctions

TT 34.12: Talk

Tuesday, March 13, 2018, 12:45–13:00, H 2053

Phase-dependent heat transport in multi-terminal Josephson junctions — •Sun-Yong Hwang and Björn Sothmann — Theoretische Physik, Universität Duisburg-Essen and CENIDE, D-47048 Duisburg, Germany

Phase-coherent heat transport has received a lot of attention recently as it offers the possibility to control heat flows at the nanoscale with the same precision as charge currents [1]. Thus, phase-coherent caloritronics provides not only fundamental insights into heat transport at the nanoscale but can also lay the foundations for future thermal logic and energy management in small electric circuits.

Here, we investigate the phase-dependent linear thermal conductance in multi-terminal Josephson junctions. The thermal conductance in our system can be controlled via the magnetic flux through the junction and the phase bias configuration among the superconductors. Remarkably, the phase- and flux-controlled heat can show a strongly unidirectional transport property which can be utilized for a heat circulator or a highly efficient cooler.
A. Fornieri, F. Giazotto, Nat. Nanotechn. 12, 944 (2017).