General Strategy for Large Nernst Coefficient

TL;DR

This paper introduces a systematic framework based on the Sommerfeld-Bethe relation to enhance the anomalous Nernst coefficient in ferromagnets, providing insights and models for achieving larger effects.

Contribution

It presents a general strategy and simplified models for significantly increasing the anomalous Nernst coefficient in ferromagnetic materials.

Findings

Framework for enhancing Nernst coefficient

Conditions for substantial enhancement identified

Models demonstrating large Nernst effects

Abstract

We propose a general strategy for enhancing the anomalous Nernst coefficient based on the Sommerfeld-Bethe relation. This approach provides a systematic framework for understanding the small anomalous Nernst coefficients typically observed in ferromagnets and identifies conditions under which substantial enhancements can be realized. We further introduce simplified models that exhibit large Nernst coefficients as offering illustrative examples.