Near-field thermal transport between twisted bilayer graphene.
Abstrak
Active control of heat flow is of both fundamental and applied interest in thermal management and energy conversion. Here, we present a fluctuational electrodynamic study of thermal radiation between twisted bilayer graphene (TBLG), motivated by its unusual and highly tunable plasmonic properties. We show that near-field heat flow can vary by more than 10-fold over only a few degrees of twist, and identify special angles leading to heat flow extrema. These special angles are dictated by the Drude weight in the intraband optical conductivity of TBLG, and are roughly linear with the chemical potential. Further, we observe multiband thermal transport due to the increasing role of interband transitions as the twist angle decreases, in analogy to monolayer graphene in a magnetic field. Our findings are understood via the surface plasmons in TBLG, and highlight its potential for manipulating radiative heat flow.
Topik & Kata Kunci
Penulis (11)
Fuwei Yang
Bai Song Center for Nano
Micro Mechanics
Tsinghua University
Department of Energy
Resources Engineering
P. University
Department of Advanced Manufacturing
Robotics
Beijing Innovation Center for Engineering Science
A. Technology
Akses Cepat
- Tahun Terbit
- 2021
- Bahasa
- en
- Total Sitasi
- 6×
- Sumber Database
- Semantic Scholar
- DOI
- 10.1103/PhysRevB.103.235415
- Akses
- Open Access ✓