Thermoelectric transport through Majorana bound states and violation of Wiedemann-Franz law

Abstract

We study features of the thermoelectric transport through a Kitaev chain hosting Majorana bound states (MBS) at its ends. We describe the behavior of the Seebeck coefficient and the ZT figure of merit for two different configurations between MBS and normal current leads. We find an important violation of the Wiedemann-Franz law in one of these geometries, leading to sizeable values of the thermoelectric efficiency over a narrow window in chemical potential away from neutrality. These findings could lead to interesting thermoelectric-based MBSs detection devices, via measurements of the Seebeck coefficient and figure of merit.

6 pages, 5 figures

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• Majorana ensembles with fractional entropy and conductance in nanoscopic systems
• Majorana differential shot noise and its universal thermoelectric crossover
• Thermoelectric processes of quantum normal-superconductor interfaces
• Majorana-mediated thermoelectric transport in multiterminal junctions
• Nonequilibrium finite frequency resonances in differential quantum noise driven by Majorana interference
• Nonlocal thermoelectricity in quantum wires as a signature of Bogoliubov-Fermi points
• Probing Majorana Bound States via Thermoelectric Transport
• Majorana Thermoelectrics and Refrigeration
• Thermoelectric fluctuations of interfering Majorana bound states
• Electrical, thermal and thermoelectric transport in open long-range Kitaev chain
• Majorana fermion induced power-law scaling in the violations of the Wiedemann-Franz law
• Fluctuation response of a minimal Kitaev chain in nonequilibrium states
• Revealing universal Majorana fractionalization using differential shot noise and conductance in nonequilibrium states controlled by tunneling phases