Synthesis and Characterization of K_x:p-Terphenyl Materials for Superconductivity

Alkali metal doped polycyclic aromatic hydrocarbons (PAH) are an exciting material platform for organic based superconductors with relatively high critical temperatures. In the case of potassium doped para-terphenyl, some studies have reported signs of superconducting transitions as high as 120 K. However, these studies are controversial because of issues with reproducibility. Additionally, the extreme air sensitivity of K_x:p-terphenyl makes it challenging to synthesize and characterize with conventional methods. Here, we present a new method of solution phase deposition of alkali doped PAHs using liquid ammonia as a solvent and apply it to reproducibly synthesize K_x:p-terphenyl materials at various doping levels. We will also present structural and physical characterization of these materials.