Majorana-mediated thermoelectric transport in multiterminal junctions

Abstract

The unambiguous identification of Majorana zero modes (MZMs) is one of the most outstanding problems of condensed matter physics. Thermal transport provides a detection tool that is sensitive to these chargeless quasiparticles. We study thermoelectric transport between metallic leads transverse to a Josephson junction. The central double quantum dot hosts conventional or topological Andreev states that depend on the phase difference $\varphi$. We show that the presence of MZMs can be identified by a significant amplification of both the electrical and thermal conductance at $\varphi \approx \pi$ as well as the Seebeck coefficient at $\varphi \approx 0$. In addition, we show that the Wiedemann-Franz law is strongly violated in the presence of MZMs around $\varphi \approx \pi$ when compared to the conventional case. We further investigate the robustness of our results against Cooper pair splitting processes.

13 pages, 8 figures, content corresponds to the published version

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Cited by in corpus (3)

• Thermoelectric processes of quantum normal-superconductor interfaces
• Transport signatures of inverted Andreev bands in topological Josephson junctions
• Limits of Thermal Conductance Quantization in Chiral Topological Josephson Junctions