Condensed Matter Seminar: Aromatic Hydrocarbon Route to High Tc Superconductivity
Starts 6 Jul 2017 11:30
Ends 6 Jul 2017 12:30
Central European Time
ICTP
Leonardo Building - Luigi Stasi Seminar Room
Field of superconductivity continues to surprise and challenge us with unanticipated new systems. A recent finding of Meissner signal at 120 K in K doped para terphenyl (three benzene rings bridged by two C-C bonds) raises several interesting questions. We will summarize superconductivity in alkali doped C60, aromatic hydrocarbons and new potential high Tc para terpheny. Focus will be on mechanism of superconductivity and limits on Tc, by making use of what we know about key quantum chemistry of aromatic hydrocarbons. Two extreme cases and possible interplay will be discussed [1]. Superconductivity arising from RVB physics in i) correlated metallic band made of LUMO orbitals of hydrocarbons, in the background of an insulating K ion subsystem and ii) correlated metallic band of an expanded alkali metal subsystem, in the background of an insulating hydrocarbon scaffold. [1] G. Baskaran, arXiv:1702.08153