Observation of zero resistivity in K-doped picene
Observation of zero resistivity in K-doped picene
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DOI：
10.1103/physrevb.87.060505
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发表时间：
2013-02
影响因子：
3.7
通讯作者：
K. Teranishi;Xuexia He;Y. Sakai;M. Izumi;H. Goto;R. Eguchi;Y. Takabayashi;T. Kambe;Y. Kubozono
中科院分区：
文献类型：
--
作者：
K. Teranishi;Xuexia He;Y. Sakai;M. Izumi;H. Goto;R. Eguchi;Y. Takabayashi;T. Kambe;Y. Kubozono
本文报道了碳氢化合物超导体的零电阻率（ρ）的观测结果，并描述了金属掺杂碳氢化合物中ρ的温度依赖性。用四端测量法测量了掺钾的三甲苯（Kpicene）的电阻率。对于Kpicene，在7K以下观察到下降，对于Kpicene，在11K以下观察到下降，这清楚地显示出零电阻率。在7K时的电阻率下降与由Kpicene的7K相的磁化率得到的超导临界温度一致，而在11K时的电阻率下降与先前报道的Kpicene的7和18K相的超导临界温度不一致。两种样品的ρ的温度依赖性在正常状态下表现出类似于颗粒金属的行为。
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 (Kpicene) has been recorded from pellet samples in a four-terminal measurement mode. A drop inis observed below 7 K for Kpicene and below 11 K for Kpicene, which clearly displays zero resistivity. The resistivity drop at 7 K is consistent with the superconducting critical temperature () obtained from the magnetic susceptibility of the 7 K phase of Kpicene, while the drop at 11 K is inconsistent with the's of both the 7 and 18 K phases of Kpicene reported previously. The temperature dependence of ρ for both samples exhibits granular-metal-like behavior in the normal state.