The superconductivity at 18 K in LiFeAs system

TL;DR

This paper reports the discovery of superconductivity at 18 K in the LiFeAs system, a new iron arsenide compound with a layered structure similar to copper oxide superconductors.

Contribution

It introduces a new iron arsenide superconductor, LiFeAs, with a simple layered structure and superconductivity at 18 K, expanding the family of iron-based superconductors.

Findings

Superconductivity observed at Tc up to 18 K

Crystallizes in tetragonal P4/nmm structure

Analogous to copper oxide layered structures

Abstract

A new iron arsenide superconducting system LiFeAs was found that crystallizes into a tetragonal structure with space group P4/nmm. The superconductivity with Tc up to 18 K was observed in the compounds. This simple 111 type layered iron arsenide superconductor can be viewed as an analogue of the infinite layer structure of copper oxides.