Anion height dependence of Tc for the Fe-based superconductor

TL;DR

This paper presents a universal relationship between anion height and critical temperature in Fe-based superconductors, providing insights into their superconducting mechanism and guiding the search for higher Tc materials.

Contribution

It establishes a symmetric anion height versus Tc plot applicable to various Fe-based superconductors, under both ambient and high-pressure conditions.

Findings

Peak Tc occurs at anion height around 1.38 Å.

Data under different pressures follow the same curve.

The plot aids understanding and discovering new superconductors.

Abstract

We have established a plot of the anion height dependence of Tc for the typical Fe-based superconductors. The plot appeared a symmetric curve with a peak around 1.38 A. Both data at ambient pressure and under high pressure obeyed the unique curve. This plot will be one of the key strategies for both understanding the mechanism of Fe-based superconductivity and search for the new Fe-based superconductors with higher Tc.