Large anomalous Nernst coefficient in an oxide skyrmion crystal Chern insulator

Abstract

Our first-principles calculation predicts a sizable transverse thermoelectric coefficient $N$ in a skyrmion crystal assumed on EuO monolayer. Such $N$ arises from the coexistence of large longitudinal thermoelectric coefficient and large Hall angle ratio, realized in the vicinity of a band gap with Chern number $\mathcal{C}=2$. This demonstrates a prototype of novel class of thermoelectric materials utilizing the topological texture of electronic spins, motivating further studies including relevant experiments.