论文标题
具有二硫酸盐结构的碳化合物的超导性
Superconductivity of Carbon Compounds with Sodalite Structure
论文作者
论文摘要
我们研究了具有二硫酸盐结构的碳化合物的超导性，该化合物类似于显示高温超导性的氢化合物。进行了第一原理计算的系统分析，包括检查外部压力$ p $下的机械和动态不稳定性。这些不稳定性分类为有效掺杂电荷与系统晶格常数的相图。我们还介绍了超导过渡温度$ t _ {\ rm c} $作为许多碳化合物的$ p $的函数，以及带有苏达岩结构的纯碳系统。他们中的一些人的$ t _ {\ rm c} $的$ p> \ sim 30 $ gpa最高约100 k，结果表明，碳的sodalite结构可能是产生声子介导的高$ t _ {\ rm c} $超导导性的关键。
We investigate the superconductivity of carbon compounds with a sodalite structure, which are similar to hydrogen compounds showing the high-temperature superconductivity. A systematic analysis by first-principles calculations is carried out, including examination of mechanical and dynamic instabilities under external pressure $P$. These instabilities are classified on the phase diagram for the effective doping charge versus the lattice constant of the system. We also present the superconducting transition temperature $T_{\rm c}$ as a function of $P$ for many carbon compounds and a pure carbon system with the sodalite structure. Some of them have $T_{\rm c}$ of up to about 100 K at $P > \sim 30$ GPa, and the results suggest that the sodalite structure of carbon may be a key to producing phonon-mediated high-$T_{\rm c}$ superconductivity.
