Large anomalous Nernst effect in a skyrmion crystal.

Yo Pierre Mizuta,Fumiyuki Ishii

doi:10.1038/srep28076

Abstract

Thermoelectric properties of a model skyrmion crystal were theoretically investigated, and it was found that its large anomalous Hall conductivity, corresponding to large Chern numbers induced by its peculiar spin structure leads to a large transverse thermoelectric voltage through the anomalous Nernst effect. This implies the possibility of finding good thermoelectric materials among skyrmion systems, and thus motivates our quests for them by means of the first-principles calculations as were employed in this study.

Highlights

Thermoelectric properties of a model skyrmion crystal were theoretically investigated, and it was found that its large anomalous Hall conductivity, corresponding to large Chern numbers induced by its peculiar spin structure leads to a large transverse thermoelectric voltage through the anomalous Nernst effect
This implies the possibility of finding good thermoelectric materials among skyrmion systems, and motivates our quests for them by means of the first-principles calculations as were employed in this study
Systems hosting AHE/ANE are found in magnetic materials, both normal semiconductors[4] and topological insulators[5]

Summary

OPEN Large anomalous Nernst effect in a skyrmion crystal

Yo Pierre Mizuta1 & Fumiyuki Ishii[2] received: 10 February 2016 accepted: 26 May 2016 Published: 16 June 2016. Thermoelectric properties of a model skyrmion crystal were theoretically investigated, and it was found that its large anomalous Hall conductivity, corresponding to large Chern numbers induced by its peculiar spin structure leads to a large transverse thermoelectric voltage through the anomalous Nernst effect. This implies the possibility of finding good thermoelectric materials among skyrmion systems, and motivates our quests for them by means of the first-principles calculations as were employed in this study. At the end of this section, we stress that the computational method used in our study is based on first-principles, which can be applied to the exploration of realistic materials of SkX etc. from the same perspective

Expressions of thermoelectric quantities

Methods

Results and Discussions

Author Contributions

Additional Information