An Electrically Controlled Heat Rectifier using Graphene Nanoribbons

D Shiri and A Isacsson, 2019 IEEE 14TH NANOTECHNOLOGY MATERIALS AND DEVICES CONFERENCE (NMDC) (2019).

Using Molecular Dynamics (MD) simulations we propose that splitting a graphene nanoribbon into two unequal strained sections using external force leads to large asymmetry in the forward and reverse heat fluxes. We find that the corresponding rectification ratio (RR) is enhanced to 60% compared to previous proposals. More importantly, the polarity of the proposed heat diode is controllable on-the-fly i.e. by changing the position where force is applied. This technique obviates the complex nano-patterning and lithography required to pattern graphene every time a new rectification value or sign is sought for and opens a route to simpler fabrication of phononic devices in 2D materials.

Return to Publications page