Giant Thermal Magnetoresistance Driven by Graphene Magnetoplasmon

TL;DR

This paper predicts a giant thermal magnetoresistance effect in graphene-based systems, where external magnetic fields significantly modulate heat flux via tunable magnetoplasmons, with potential applications in thermal sensors and management.

Contribution

It introduces the first demonstration of giant thermal magnetoresistance driven by graphene magnetoplasmons, enabling magnetic control of thermal photon transport.

Findings

Heat flux modulated by approximately three orders of magnitude.

Achieved negative and giant relative thermal magnetoresistance ratios.

Effect observed at magnetic fields up to 4 Tesla.

Abstract

In this work, we have predicted a giant thermal magnetoresistance for the thermal photon transport based on the tunable magnetoplasmon of graphene. By applying an external magnetic field, we find that the heat flux can be modulated by approximately three orders of magnitude. Accordingly, negative and giant relative thermal magnetoresistance ratios are both achieved for magnetic fields with a maximum strength of 4 Tesla. This effect is mainly caused by the suppression and enhancement of scattering interactions mediated by graphene magnetoplasmon. Specifically, it has never been achieved before for nanoparticles, which have no response to magnetic fields. The effect is remarkable at these reasonable strengths of fields, and thus has considerable significance for the real-life applications. It is also expected to enable technological advances for the thermal measurement-based magnetic sensor and magnetically thermal management.