Superconductivity in PbO-type Fe chalcogenides

TL;DR

This paper reviews the properties of PbO-type Fe chalcogenides, focusing on their superconductivity, magnetism, pressure effects, and potential applications, highlighting their significance in understanding Fe-based superconductors.

Contribution

It provides a comprehensive overview of the structural, magnetic, and superconducting properties of PbO-type Fe chalcogenides, emphasizing the relationship between magnetism and superconductivity.

Findings

FeSe is an intrinsic superconductor with a simple structure.

FeTe exhibits antiferromagnetic order despite structural similarity to FeSe.

Pressure significantly affects Tc, indicating a link with structure and magnetism.

Abstract

PbO-type Fe chalcogenide has been drawing much attention as the Fe-based superconductor with the most simple crystal structure. Whereas FeSe is an intrinsic superconductor, FeTe, while having a structure analogous to FeSe, exhibits antiferromagnetic ordering. The relationship between antiferromagnetism and superconductivity provides key information to understand better superconductivity in Fe chalcogenides. Furthermore the significant pressure effect on Tc in the Fe-chalcogenide superconductors, which is likely to be correlated with the crystal structure and/or magnetism, is important in elucidating the mechanism of Fe-based superconductivity. Due to the simple structure and composition, Fe-chalcogenide superconductor is one candidate for applications to such areas as superconducting wires and thin films.