论文标题
超出Migdal理论的孔掺杂石墨烯中的超导能量差距
The superconducting energy gap in the hole-doped graphene beyond the Migdal's theory
论文作者
论文摘要
在这项工作中，我们分析了非绝热效应对孔掺杂石墨烯中超导能量间隙的影响。通过在Migdal定理之外使用Eliashberg的形式主义，我们表明，非绝热效应强烈影响示例性硼掺杂石墨烯中的超导能量差距。特别是，由一阶顶点校正对电子 - phonon相互作用的一阶顶点校正表示，补充了库仑depairing相关性并抑制超导状态。总之，获得的结果证实了先前关于二维材料超导性的研究，并表明相应的超导阶段可能受到非绝热效应的影响。
In this work we analyze impact of non-adiabatic effects on the superconducting energy gap in the hole-doped graphene. By using the Eliashberg formalism beyond the Migdal's theorem, we present that the non-adiabatic effects strongly influence the superconducting energy gap in the exemplary boron-doped graphene. In particular, the non-adiabatic effects, as represented by the first order vertex corrections to the electron-phonon interaction, supplement Coulomb depairing correlations and suppress the superconducting state. In summary, the obtained results confirm previous studies on superconductivity in two-dimensional materials and show that the corresponding superconducting phase may be notably affected by the non-adiabatic effects.
