Kapitza thermal resistance characterization of epitaxial graphene–SiC(0001) interface - Archive ouverte HAL Access content directly
Journal Articles Applied Physics Letters Year : 2019

Kapitza thermal resistance characterization of epitaxial graphene–SiC(0001) interface

Abstract

This work presents the measurements of the Kapitza thermal boundary resistance (TBR) between two types of graphene monolayers epitaxially grown on the silicon face of SiC(0001) substrates by chemical vapor deposition. The studied systems consist of a graphene layer either separated from the bulk SiC by a carbon rich interface layer (called buffer layer BL) exhibiting a (63‾√×63‾√)R30° surface reconstruction or quasifreestanding on the substrate, which will be referred to as QFSMG (for the quasifreestanding monolayer of graphene). The equivalent graphene monolayers' thermal resistances (ratio between the layer thickness and its thermal conductivity) and their respective TBR with the SiC substrates were characterized using a high frequency photothermal radiometry technique in order to distinguish the difference between the two interfaces. The results display a larger TBR through the BL compared to a lower one across the QFSMG. It is suggested that beyond generally used models, the presence of electronic coupling between the QFSMG and the SiC may create new channels for heat conduction at the interface. These results give new insights into the thermal transport at the nanoscale using epitaxial graphene monolayers for better usage in heat management applications (e.g., thermal diodes or thermal transistors).
No file

Dates and versions

hal-03108345 , version 1 (13-01-2021)

Identifiers

Cite

Georges Hamaoui, Roy Dagher, Yvon Cordier, Adrien Michon, Sylvain Potiron, et al.. Kapitza thermal resistance characterization of epitaxial graphene–SiC(0001) interface. Applied Physics Letters, 2019, 114 (22), pp.221601. ⟨10.1063/1.5092207⟩. ⟨hal-03108345⟩

Collections

URCA ITHEMM
50 View
0 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More