Superconductivity and weak anti-localization in nodal-line semimetal SnTaS_2

TL;DR

This study investigates the topological and superconducting properties of SnTaS2, a nodal-line semimetal, revealing its potential as a platform for exploring topological superconductivity through magneto-transport measurements.

Contribution

The paper reports the first detailed magnetization and magneto-transport analysis of SnTaS2, demonstrating its topological features and superconductivity at 2.9 K.

Findings

Superconducting transition at 2.9 K

Large magneto-resistance and weak anti-localization effects

Moderate anisotropy in upper critical fields

Abstract

Topological semimetals with superconducting properties provide an emergent platform to explore the properties of topological superconductors. We report magnetization, and magneto-transport measurements on high quality single crystals of transition metal dichalcogenide SnTaS2. It is a nodal line semimetal with superconducting transition below Tc = 2.9 K. Moderate anisotropy (3.1) is observed in upper critical fields along H||c and H||ab plane. In the normal state we observe large magneto-resistance and weak anti-localization effect that provide unambiguous confirmation of topological features in SnTaS2. Therefore, genuine topological characteristics can be studied in this material, particularly with regard to microscopic origin of order parameter symmetry.