Electron-Phonon Coupling in Doped p-Terphenyl*

Potassium-doped para-terphenyl has been reported to be a high critical temperature superconductor. {1,2,3} As a necessary step towards understanding this novel superconductivity, we study electronic structure and electron-phonon coupling in electron doped p-terphenyl using density functional (pertubation) theory calculations for both isolated molecules and extended crystals. Migdal-Elaishberg and dynamical mean field methods are then used to analyse quasiparticle properties and superconducting instabilities. The relevance of polaron physics to this superconductor will also be discussed.
{1} Ren-Shu Wang, Yun Gao, Zhong-Bing Huang and Xiao-Jia Chen. Arxiv: 1703.06641
{2} Ren-Shu Wang, Yun Gao, Zhong-Bing Huang and Xiao-Jia Chen. Arxiv: 1703.05804
{3} Haoxiang Li, Xiaoqing Zhou, Stephen Parham, Thomas Nummy, Justin Griffith, Kyle Gordon, Eric L. Chronister and Daniel. S. Dessau. Arxiv: 1704.04230