Superconductivity in alkali-metal-doped picene
Superconductivity in alkali-metal-doped picene
复制标题
DOI：
10.1038/nature08859
复制
发表时间：
2010-03-04
期刊：
影响因子：
64.8
通讯作者：
Kubozono, Yoshihiro
中科院分区：
文献类型：
--
作者：
Mitsuhashi, Ryoji;Suzuki, Yuta;Kubozono, Yoshihiro
在基础科学和应用前景的推动下，识别和开发新型超导材料的努力仍在快速进行。例如，最近开发了几种新的超导材料系统，包括钙插层石墨化合物 (1)、掺硼金刚石 (2) 和最突出的砷化铁，例如 LaO1-xFxFeAs（参考文献 3）。然而，就有机超导体而言，过去十年尚未发现具有高超导转变温度（T-c）的新材料系统。在这里，我们报告将碱金属嵌入到宽带隙半导体固体烃五苯烯中，产生金属行为和超导性。固体钾插层二烯 (K(x)picene) 显示的 T-c 值为 7K 和 18 K，具体取决于金属含量。 Kxpicene 固体中的磁化强度在转变温度下急剧下降（
Efforts to identify and develop new superconducting materials continue apace, motivated by both fundamental science and the prospects for application. For example, several new superconducting material systems have been developed in the recent past, including calcium-intercalated graphite compounds(1), boron-doped diamond(2) and-most prominently-iron arsenides such as LaO1-xFxFeAs (ref. 3). In the case of organic superconductors, however, no new material system with a high superconducting transition temperature (T-c) has been discovered in the past decade. Here we report that intercalating an alkali metal into picene, a wide-bandgap semiconducting solid hydrocarbon, produces metallic behaviour and superconductivity. Solid potassium-intercalated picene (K(x)picene) shows T-c values of 7K and 18 K, depending on the metal content. The drop of magnetization in Kxpicene solids at the transition temperature is sharp (