论文标题
准二维多型材料的鲁棒超导性
Robust Superconductivity in Quasi-One-Dimensional Multiband Materials
论文作者
论文摘要
最近，已经证明，在一种多型和超导材料中，具有常规较高维带的准二维（Q1D）带的成对交换耦合可以导致形成强大的聚集配对凝结物。特别是，已经发现，在存在深层传统带的情况下，Q1D热对波动被抑制，其中费米水平比特征性截止能量大得多。在这里，我们报告说，即使存在近乎较浅的高维带，Q1D波动的影响也会显着削弱，这在新兴链条结构的超导材料A_2CR_3AS_3（a = k，rb，cs，cs）中发现了新的启示。
Recently it has been demonstrated that the pair-exchange coupling of quasi-one-dimensional (Q1D) bands with conventional higher-dimensional bands in one multiband superconducting material can result in the formation of robust aggregate pair condensate. In particular, it has been found that the Q1D thermal pair fluctuations are suppressed in the presence of deep conventional band(s), where the Fermi level is much larger than the characteristic cut-off energy. Here we report that impact of the Q1D fluctuations is significantly weakened even in the presence of nearly shallow higher-dimensional band(s), which shed new light on robust superconducting state observed in emerging chain-like-structured superconducting materials A_2Cr_3As_3 (A = K, Rb, Cs).
