We report the observation of zero resistivity (ρ) in a hydrocarbon superconductor, and describe the temperature dependence of ρ in metal-doped hydrocarbons. The resistivity of K-doped picene (Kxpicene) has been recorded from pellet samples in a four-terminal measurement mode. A drop in ρ is observed below 7 K for K3.1picene and below 11 K for K 3.5picene, which clearly displays zero resistivity. The resistivity drop at 7 K is consistent with the superconducting critical temperature (T c) obtained from the magnetic susceptibility of the 7 K phase of K3picene, while the drop at 11 K is inconsistent with the T c's of both the 7 and 18 K phases of K3picene reported previously. The temperature dependence of ρ for both samples exhibits granular-metal-like behavior in the normal state.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - Feb 15 2013|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics