Breakdown of Chemical Scaling for Pt-Doped CaFe2As2

TL;DR

This paper investigates how Pt doping affects the magnetic and superconducting properties of CaFe2As2, revealing a breakdown in expected scaling laws and providing insights into doping effects in iron-based superconductors.

Contribution

It demonstrates that Pt doping does not suppress antiferromagnetism or induce superconductivity in CaFe2As2, challenging previous assumptions about doping effects.

Findings

Pt substitution does not reduce T_N or induce superconductivity.

Pt-doped CaFe2As2 remains non-superconducting.

Provides insights into chemical doping effects in iron-based superconductors.

Abstract

We report a breakdown of the scaling of the antiferromagnetic transition temperature T_N on chemical doping for Pt-doped CaFe2As2. The substitution of Pt is ineffective in the reduction of antiferromagnetic ordering as well as in inducing superconductivity in Ca(Fe1-xPtx)2As2. The Pt-doped CaFe2As2 that does not exhibit superconductivity will, however, provide us an ideal opportunity to elucidate the role of chemical doping in the occurrence of superconductivity in iron-based materials.