Cooperative Spin Caloritronic Devices

TL;DR

This paper introduces a new type of thermoelectric device called cooperative spin caloritronics device (CSCD) that leverages multiple energy channels to significantly boost efficiency, supported by analytic derivations and practical examples.

Contribution

The paper presents the concept of CSCDs, deriving their efficiency limits analytically and demonstrating their advantages over existing spin caloritronic devices.

Findings

Cooperative effects enhance the figure of merit and efficiency.

Analytic expressions for maximum efficiency are derived.

Examples show improved performance in various CSCD implementations.

Abstract

We report a concept of thermoelectric devices, cooperative spin caloritronics device (CSCD), where cooperation between two or more energy channels such as spin, charge and heat currents can significantly enhance energy efficiency of spin caloritronic devices. We derive the figure of merit and the maximum efficiency due to cooperative effect in analytic forms for a CSCD. Cooperative effects significantly improve the figure of merit and the maximum efficiency in spin caloritronic systems with multiply couplings effects. Several examples of CSCDs, including electrical and thermal current induced DW motion, spin-thermoelectric power generator and spin-thermoelectric cooling/heating, are studied to illustrate the usefulness of the cooperative effect. We compare the efficiency of CSCD with several recently proposed spin caloritronic devices. Our scheme provides a novel route to seek high performance materials and structures for future spin caloritronic devices.