Transport properties and electronic phase diagram of single-crystalline Ca10(Pt3As8)((Fe1$-${}xPtx)2As2)5

Authors:
Publisher website
Google Scholar
Abstract
Sizable single-crystalline samples of Ca10(Pt3As8)((Fe1$-${}xPtx)2As2)5 (the 10-3-8 phase) with 0$\leqslant${}x<0.1 have been grown and have been systematically characterized via x-ray diffraction, magnetic, and transport measurements. The unsubstituted sample is a heavily doped semiconductor with no sign of magnetic order down to 2~K. With increasing Pt content, the metallic behavior appears, and superconductivity is realized for x$\geqslant${}0.023. Tc rises to its maximum of approximately 13.6~K at the doping level of x$\sim${}0.06 and then decreases for higher x values. The electronic phase diagram of the 10-3-8 phase was mapped out based on the magnetic and transport measurements. The mass anisotropy parameter $\Gamma${}$\sim${}10, obtained from resistive measurements in magnetic fields, indicates a relatively large anisotropy in the iron-based superconductor family. This strong two-dimensional character may lead to the absence of magnetic order. A linear T dependence of susceptibility at high temperatures is observed, indicating that spin fluctuations exist in the underdoped region as in most of the Fe-pnictide superconductors.
All Related Versions

This publication has 56 references indexed in Scilit: