Pressure-induced reentrant superconductivity in the misfit layered compound (SnS)1.15(TaS2)

Chutong Zhang; Jiajia Feng; Xiao Tang; Xiangzhuo Xing; Na Zuo; Xiaolei Yi; Yan Meng; Xiaoran Zhang; Rajesh Kumar Ulaganathan; Raman Sankar; Xiaofeng Xu; Xin Chen; Xiaobing Liu

doi:10.1103/vcqm-h54l

Pressure-induced reentrant superconductivity in the misfit layered compound (SnS)1.15(TaS2)

Chutong Zhang, Jiajia Feng, Xiao Tang, Xiangzhuo Xing, Na Zuo, Xiaolei Yi, Yan Meng, Xiaoran Zhang, Rajesh Kumar Ulaganathan, Raman Sankar, Xiaofeng Xu, Xin Chen, Xiaobing Liu

DOI 10.1103/vcqm-h54l · Physical Review B

T1

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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 (SnS)1.15(TaS2) under pressures up to ∼150 GPa. The low-pressure superconducting phase is gradually suppressed and disappears near 14.7 GPa. 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 intimate connection with pressure-driven electronic reconstruction. Our work demonstrates 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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
(SnS)1.15(TaS2) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	3	Pressure unresolved	onset
(SnS)1.15(TaS2) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.9	Pressure unresolved	zero_resistance
(SnS)1.15(TaS2) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.9	Pressure unresolved	midpoint
(SnS)1.15(TaS2) Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4.9	145 GPa	onset
TaS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.8	Pressure unresolved	unknown