论文标题
调整碱富勒底膜中的电子状态和超导性
Tuning the electronic states and superconductivity in alkali fulleride films
论文作者
论文摘要
使用最先进的分子束的超级传导碱（a $ _x $ c $ _ {60} $，a = k，rb，cs）的胶片的成功制备克服了空中敏感性和相位分离的弊端，以_x $ c $ c $ c $ c $ c $ _} $ _x $ _}的空气敏感性和相位分离的弊端来占据。分子尺度上的碱富勒底的超导性。在本文中，我们简要回顾了FCC A $ _x $ c $ _ {60} $在石墨化的SIC底物上生长的FCC A $ _X $ c $ _ $ _x $ c $ _ $ _x $ c $ _ $ _x $ c $ _ $ _x $ c $ _ $ _x $ _x $ c $ _ $ _x $ _x $ _x $ _x $ _x $ _x $ _x $ _x $ _x $ _x $ _x $ _x $ _x $ _x的隧道显微镜的结果。强劲的$ s $ - 波超导率针对伪群，电子相关性，非磁性杂质和Merohedral Dishiper揭示。通过控制碱金属物种，膜的厚度和电子兴奋剂，我们可以系统地调整C $ _ {60}^{X - } $定向订购和超导性，并在$ _x $ c $ _ {60} $胶片中进行胶片，然后完整统一的相位图的超级电导相图Vs vap ape vs electrication and ded。这些调查是结论性的，并阐明了$ s $波超导性在碱富勒里德的保留，尽管具有电子相关性和伪造的存在。
The successful preparation of superconducting alkali fulleride (A$_x$C$_{60}$, A = K, Rb, Cs) films using state-of-the-art molecular beam epitaxy overcomes the disadvantages of the air-sensitivity and phase separation in bulk A$_x$C$_{60}$, enabling for the first time a direct investigation of the superconductivity in alkali fullerides on the molecular scale. In this paper, we briefly review recent cryogenic scanning tunneling microscopy results of the structural, electronic, and superconducting properties of the fcc A$_x$C$_{60}$ films grown on graphitized SiC substrates. Robust $s$-wave superconductivity is revealed against the pseudogap, electronic correlation, non-magnetic impurities, and merohedral disorder. By controlling the alkali metal species, film thickness, and electron doping, we systematically tune the C$_{60}^{x-}$ orientational orderings and superconductivity in A$_x$C$_{60}$ films and then complete a unified phase diagram of superconducting gap size vs electronic correlation and doping. These investigations are conclusive and elucidated that the $s$-wave superconductivity retains in alkali fullerides despite of the electronic correlation and presence of pseudogap.
