Superconducting gap in high-temperature superconductors

我们已经研究了铜酸盐和铁基超导体的扫描隧道显微镜/光谱。我们发现，载流子掺杂到Mott绝缘体，这是一个母体材料的铜氧化物超导体，诱导一个赝能隙态，打破了下面的晶格的对称性。我们发展了一种技术，使我们能够分析超导间隙的相位。利用这种新技术，我们确定了铁基超导体的超导能隙结构。我们还研究了这些超导体中量子化涡旋的电子态。

We have investigated cuprate and iron-based superconductors by scanning tunneling microscopy/spectroscopy. We found that carriers doped into a Mott insulator, which is a parent material of cuprate superconductors, induce a pseudo-gap state which breaks symmetry of the underlying lattice. We developed a technique which enables us to analyze the phase of superconducting gap. Using this new technique, we determined the superconducting-gap structure of an iron-based superconductor. We have also studied electronic states of quantized vortices in these superconductors.