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Thermoelectric effects in superconductor-ferromagnet heterostructures

Allen, Portia J.
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Singh, Meenakshi
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Date
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2023
Date Submitted
Keywords
cryogenics
 superconductivity
 thermoelectricity
 thermometry
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2023 - Mines Theses & Dissertations
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Allen_mines_0052N_12762.pdf
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https://hdl.handle.net/11124/179115
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Abstract
Superconductor-ferromagnetic (S-F) heterostructures have been predicted to show significant thermoelectric effects at cryogenic temperatures. Superconductors have a poor thermoelectric figure of merit (zT) on their own due to a symmetric density of states (DOS). However, in the presence of an external magnetic field, the DOS of the up and down spin states becomes asymmetric separately. A spin filtering material can then be added to detect only one of the two spin states. This project builds on previous efforts to measure thermoelectric effects in S-F hybrids. By improving experimental design over previous efforts, we will test the predicted thermoelectric efficiency and further the understanding of thermal transport in S-F systems.
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