Observation of zero resistivity in K-doped picene

Kazuya Teranishi, Xuexia He, Yusuke Sakai, Masanari Izumi, Hidenori Goto, Ritsuko Eguchi, Yasuhiro Takabayashi, Takashi Kambe, Yoshihiro Kubozono

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25 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number060505
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume87
Issue number6
DOIs
Publication statusPublished - Feb 15 2013

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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