ARPES investigation of Fe-based superconductor KFe$_2$As$_2$ and related compounds
ORAL
Abstract
KFe$_2$As$_2$ is the end-member of the Ba$_{1-x}$K$_x$Fe$_2$As$_2$ family of Fe-based superconductors. Despite a small $T_c$ of 3 K, this compound is of particular interest because unlike the other members of this family of superconductors, the Fermi surface of KFe$_2$As$_2$ is free of electron pocket. Interest for this material was intensified following various reports on possible nodal superconducting order parameters in this system. Due to its momentum-resolved capabilities, angle-resolved photoemission spectroscopy (ARPES) is particularly suitable for investigating the key aspects of the electronic structure of materials. In this work we present recent ARPES data of KFe$_2$As$_2$ and related materials.
–