# Nonlocal thermoelectric effects in high-field superconductor-ferromagnet hybrid structures

## TL;DR

This paper experimentally demonstrates nonlocal spin-dependent thermoelectric effects in superconductor-ferromagnet structures, revealing long-range heat and spin transport phenomena in high-field superconductors.

## Contribution

It provides the first experimental observation of nonlocal thermoelectric effects in superconductor-ferromagnet hybrid structures under high magnetic fields.

## Key findings

- Thermoelectric currents observed at distances over 10 micrometers.
- Results align with theories of coupled spin and heat transport.
- Demonstrates long-range thermoelectric effects in superconductors.

## Abstract

We report on the experimental observation of nonlocal spin-dependent thermoelectric effects in superconductor-ferromagnet multiterminal structures. Our samples consist of a thin superconducting aluminum wire with several ferromagnetic tunnel junctions attached to it. When a thermal excitation is applied to one of the junctions in the presence of a Zeeman splitting of the density of states of the superconductor, a thermoelectric current is observed in remote junctions at distances exceeding $10~\mathrm{\mu m}$. The results can be explained by recent theories of coupled spin and heat transport in high-field superconductors.