Two-fold anisotropic superconducting state in topological superconductor Sn4Au

Abstract Here we report the anisotropic magnetotransport properties in the superconducting state of a Sn 4 Au single crystal. The Sn 4 Au single crystal is synthesized through an easy melt growth method. Superconducting properties are evidenced from resistivity vs . temperature ( ρ - T ) and DC magnetization measurements. Isothermal magnetization measurements ( M - H ) hint toward type-II superconductivity in Sn 4 Au. In-plane and out-of-plane ρ - H measurements show anisotropic behavior of the upper critical field at temperatures below superconducting transition ( T c = 2.3 K). The observed anisotropy is more elucidated in ρ - H measurements performed below at different tilt angles. The anisotropy parameter is found to be 1.26. The observed results show the presence of a two-fold anisotropic superconducting state in the Sn 4 Au single crystal, which may be induced due to the layered structure of the synthesized Sn 4 Au single crystal.