Room-Temperature Skyrmion Thermopower in Fe3Sn2

TL;DR

This study reports the first observation of room-temperature thermopower associated with skyrmion lattices in Fe3Sn2, highlighting potential for skyrmion-based thermoelectric devices.

Contribution

It demonstrates the thermoelectric signature of skyrmion lattices at room temperature in a Kagome Dirac material, enabling skyrmion detection via thermopower.

Findings

Thermopower dominated by electronic diffusion at room temperature.

Skyrmion lattice exhibits magnetic-field dependence of wavevector.

First room-temperature thermoelectric signature of skyrmions in Fe3Sn2.

Abstract

We present first room-temperature thermoelectric signature of the skyrmion lattice. This was observed in Fe3Sn2, a Kagome Dirac crystal with massive Dirac fermions that features high-temperature skyrmion phase. The room-temperature skyrmion lattice shows magnetic-field dependence of the wavevector whereas thermopower is dominated by the electronic diffusion mechanism, allowing for the skyrmionic bubble lattice detection. Our results pave the way for the future skyrmion-based devices based on the manipulation of the thermal gradient.