Charalambos Evangeli, Jacob Swett, Jean Spiece, Edward McCann, Jasper Fried, Achim Harzheim, Andrew R Lupini, G Andrew D Briggs, Pascal Gehring, Stephen Jesse, Oleg V Kolosov, Jan A Mol, Ondrej Dyck
Graphene is atomically thin, possesses excellent thermal conductivity, and is able to withstand high current densities, making it attractive for many nanoscale applications such as field-effect transistors, interconnects, and thermal management layers. Enabling integration of graphene into such devices requires nanostructuring, which can have a drastic impact on the self-heating properties, in particular at high current densities. Here, we use a combination of scanning thermal microscopy, finite element thermal analysis, and operando scanning transmission electron microscopy techniques to observe prototype graphene devices in operation and gain a deeper understanding of the role of geometry and interfaces during high current density operation...
April 19, 2024: ACS Nano