Physical properties of single crystalline BaSn5

TL;DR

This study thoroughly investigates the physical properties of high-quality single crystalline BaSn5, revealing its nature as a strongly coupled, multiband superconductor with nearly isotropic upper critical field and pressure-dependent transition temperature.

Contribution

It provides detailed thermodynamic and transport measurements of BaSn5, including evidence of multiband superconductivity and quantum oscillations, expanding understanding of this binary intermetallic superconductor.

Findings

BaSn5 is a strongly coupled, multiband superconductor.

Hc2(T) is nearly isotropic.

Hydrostatic pressure decreases Tc at ~ -0.053 K/kbar.

Abstract

We present a comprehensive study of the binary intermetallic superconductor, BaSn5. High-quality single crystalline BaSn5 was grown out of Sn flux. Detailed thermodynamic and transport measurements were performed to study BaSn5's normal and superconducting state properties. This material appears to be a strongly coupled, multiband superconductor. Hc2(T)is almost isotropic. De Haas-van Alphen oscillations were observed and two effective masses were estimated from the FFT spectra. Hydrostatic pressure causes a decrease in the superconducting transition temperature at the rate of ~ -0.053 K/kbar.