Heat transport in multilayer abrupt graphene junctions modulated with convexity-shaped quantum structure
Institute of Mathematics and Physics, Central South University of Forestry and Technology Changsha 410004, China
2 Department of Applied Physics, Hunan University - Changsha 410082, China
Accepted: 9 May 2012
By using the force-constant and elastic wave continuum models, we investigate the ballistic phonon transport and thermal conductance in multilayer zigzag graphene nanoribbon junctions modulated with convexity-shaped quantum structures at low temperatures. The results show that the convexity-shaped (T-shaped or H-shaped) quantum structure can enhance thermal conductance at very low temperatures. The enhancement originates from the increased attenuation length of the evanescent modes in convexity-shaped quantum structures. A brief analysis of these results is given.
PACS: 63.22.Rc – Phonons in graphene / 73.22.-f – Electronic structure of nanoscale materials and related systems / 44.10.+i – Heat conduction
© EPLA, 2012