Angle-resolved photoemission spectroscopy study on iron-based superconductors
Abstract
<p indent="0mm">High-<italic>T</italic><sub>c</sub> superconductivity is one of the central puzzles in modern condensed matter physics, because it not only shows great potential for applications but also the study of high-<italic>T</italic><sub>c</sub> superconductivity deeply affects our way of thinking about many-body problems and correlations in condensed matter physics. Iron-based superconductors are the second family of high-<italic>T</italic><sub>c</sub> superconductors discovered at ambient pressure since the discovery of cuprates. Therefore, the discovery of iron-based superconductors attracts great interest. Angle-resolved photoemission spectroscopy (ARPES) is a powerful experimental technique that directly detects the electronic structures of materials. In this review, the ARPES studies of iron-based superconductors on various aspects, including electronic structure, symmetry-breaking states, gap anisotropy, and topological superconductivity, are summarized. We show how these spectroscopic data help us unveil the pairing mechanism and topological characteristic of iron-based superconductors.</p>
