Relationship Between Crystal Structure and Superconductivity in Iron-based Superconductors

摘要

Recently, iron-based superconductors have attracted great attention as new high-Tc materials. We have clarified that there is a strong relationship between crystal structure and superconductivity using neutron diffraction technique. Characteristically, superconducting transition temperatures attain maximum values when FeAs_4-tetrahedrons form a regular shape.