论文标题
超级导向率从扣除额外的订购
Superconductivity from buckled-honeycomb-vacancy ordering
论文作者
论文摘要
空缺在固态物理和材料科学中很普遍且通用。但是，到目前为止，空缺在强相关的材料中的作用仍未进行。在这里，我们报告了一个前所未有的空缺状态，形成了IR $ _ {16} $ sb $ _ {18} $中的扩展扣除式荷花comb-vacancy（BHV）订购。超导率是通过抑制额外的IR原子进入空缺或iSovalent rh替换来抑制BHV排序的出现。空缺排序的相图揭示了超导性与BHV排序竞争。进一步的理论计算表明，该顺序源于空置形成能和费米表面嵌套的协同作用，其波矢量为（1/3、1/3、0）。屈曲结构破坏了晶体反转对称性，并且大部分可以抑制费米水平附近的状态密度。 BHV订购的特殊性强调了“相关职位空缺”的重要性，并且可以作为探索其他非平凡激发和量子关键的范式。
Vacancies are prevalent and versatile in solid-state physics and materials science. The role of vacancies in strongly correlated materials, however, remains uncultivated until now. Here, we report the discovery of an unprecedented vacancy state forming an extended buckled-honeycomb-vacancy (BHV) ordering in Ir$_{16}$Sb$_{18}$. Superconductivity emerges by suppressing the BHV ordering through squeezing of extra Ir atoms into the vacancies or isovalent Rh substitution. The phase diagram on vacancy ordering reveals the superconductivity competes with the BHV ordering. Further theoretical calculations suggest that this ordering originates from a synergistic effect of the vacancy formation energy and Fermi surface nesting with a wave vector of (1/3, 1/3, 0). The buckled structure breaks the crystal inversion symmetry and can mostly suppress the density of states near the Fermi level. The peculiarities of BHV ordering highlight the importance of "correlated vacancies" and may serve as a paradigm for exploring other non-trivial excitations and quantum criticality.
