论文标题
掺杂钾的para-苯基：结构，电运输特性和超导过渡的可能特征
Potassium-Doped Para-Terphenyl: Structure, Electrical Transport Properties and Possible Signatures of a Superconducting Transition
论文作者
论文摘要
最近，通过磁敏感性测量值以及通过ARPES和STM技术测量的大型超导间隙，获得了碱掺杂有机材料（例如掺杂钾的P-甲苯基（KPT））中高-TC超导性的初步证据。在这项工作中，KPT样品已通过化学方法合成，并以低温拉曼散射和电阻率测量为特征。在这里，我们报告以压缩粉末形式的低温下低温下的电阻率下降超过4个数量级。这一事实被解释为在颗粒KPT以下的90 K以下进行的广泛超导过渡的可能迹象。 KPT系统的颗粒状性质似乎也与临界温度周围电阻率下降的20 K扩大有关。
Preliminary evidence for the occurrence of high-Tc superconductivity in alkali-doped organic materials, such as potassium-doped p-terphenyl (KPT), were recently obtained by magnetic susceptibility measurements and by the opening of a large superconducting gap as measured by ARPES and STM techniques. In this work, KPT samples have been synthesized by a chemical method and characterized by low-temperature Raman scattering and resistivity measurements. Here, we report the occurrence of a resistivity drop of more than 4 orders of magnitude at low temperatures in KPT samples in the form of compressed powder. This fact was interpreted as a possible sign of a broad superconducting transition taking place below 90 K in granular KPT. The granular nature of the KPT system appears to be also related to the 20 K broadening of the resistivity drop around the critical temperature.
