What is it about?
Recent theoretical and experimental works have reported a sizeable thermoelectric effect in conventional superconductor/insulator/superconductor tunnel junctions, where the superconductors have different energy gaps. Intriguingly, the thermoelectricity in this kind of junctions is necessarily bipolar. This means that two opposite thermoelectric voltages/currents are equivalently generated with the same thermal gradient thereby realizing a unique functionality for a thermoelectric device. Here, we theoretically investigate how replacing a superconductor with a superconductor/normal metal bilayer affects the nonlinear bipolar thermoelectricity.
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Why is it important?
Our results provide a guide to further improve the thermoelectric performance in superconducting tunnel junctions, with promising implications for a number of applications.
Read the Original
This page is a summary of: Bipolar thermoelectricity in S/I/NS and S/I/SN superconducting tunnel junctions, Applied Physics Letters, June 2023, American Institute of Physics,
DOI: 10.1063/5.0152705.
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