Pressure-induced reentrant superconductivity in a misfit layered compound $(\mathrm{SnS}{)}_{1.15}(\mathrm{Ta}{\mathrm{S}}_2)$

Abstract

Misfit layered compounds are natural van der Waals heterostructures in which electronically active transition-metal dichalcogenide layers are decoupled by incommensurate blocking layers, enabling bulk realization of quasi-two-dimensional quantum states. Here we investigate the superconducting, transport,and structural properties of the misfit compound $(\mathrm{SnS}{)}_{1.15}(\mathrm{Ta}{\mathrm{S}}_2)$ under pressures up to 150 GPa. The low-pressure superconducting phase is gradually suppressed and disappears near 14.7 GPa,accompanied by increasing residual resistance. Remarkably, a distinct superconducting phase reemerges above 80 GPa and persists to the highest pressures achieved. This reentrant superconductivity follows a pressure-induced sign reversal of the Hall coefficient near 60 GPa and a nonmonotonic evolution of the normal-state resistance, indicating an electronic reconstruction. No structural phase transition is detected over the entire pressure range. Our results demonstrate a pressure-driven electronic reconstruction leading to reentrant superconductivity in a misfit layered compound, establishing pressure as an effective route to engineer superconductivity and electronic states in natural van der Waals heterostructures.

12 pages,4 figures

References in corpus (11)

• Van der Waals heterostructures
• 2D materials and van der Waals heterostructures
• Evidence of Gate-Tunable Mott Insulator in Trilayer Graphene-Boron Nitride Moiré Superlattice
• Tuning Ising superconductivity with layer and spin-orbit coupling in two-dimensional transition-metal dichalcogenides
• Topological superconductivity in a van der Waals heterostructure
• Enhanced Superconductivity and Suppression of Charge-density Wave Order in 2H-TaS${}_2$ in the Two-dimensional Limit
• Misfit Layered Compounds: Unique, Tunable Heterostructured Materials with Untapped Properties
• Pressure induced nonmonotonic evolution of superconductivity in 6R-TaS2 with a natural bulk van der Waals heterostructure
• Protection of Ising spin-orbit coupling in bulk misfit superconductors
• Revealing the two-dimensional electronic structure and anisotropic superconductivity in a natural van der Waals superlattice (PbSe)${}_{1.14}$NbSe${}_2$
• Anisotropic, multiband, and strong-coupling superconductivity of the Pb0.64Bi0.36 alloy