Ong, Zhun-YongFischetti, Massimo V.Serov, Andrey Y.Pop, Eric2014-09-042014-09-042013-05-03Zhun-Yong Ong, Fischetti, M. V., Serov,A. Y. and Pop, Eric. 2013. "Signatures of dynamic screening in interfacial thermal transport of grapheme." Physical Review B: Condensed Matter & Materials Physics 87(19), doi:10.1103/PhysRevB.87.195404)1098-0121http://hdl.handle.net/10735.1/3954The interaction between graphene and various substrates plays an important and limiting role on the behavior of graphene films and devices. Here we uncover that dynamic screening of so-called remote substrate phonons (RPs) has a significant effect on the thermal coupling at the graphene-substrate interface. We calculate the thermal conductance hRP between graphene electrons and substrate, and its dependence on carrier density and temperature for SiO₂, HfO₂, h-BN, and Al₂O₃ substrates. The dynamic screening of RPs leads to one order of magnitude or more decrease in hRP and a change in its dependence on carrier density. Dynamic screening predicts a decrease of ~1 MW K⁻¹ m⁻² while static screening predicts a rise of ~10 MW K⁻¹ m⁻² when the carrier density in Al₂O₃-supported graphene is increased from 10¹² to 10¹³ cm⁻².©2013 American Physical SocietyPhononsGrapheneSilicaarticle87195404