Fig. 2: Transport measurements under several pressures reveal two superconducting states.
a Temperature (T) dependence of the four-probe resistance (R) for the 1T’-WS2 device measured at different hydrostatic pressures (P). The sample exhibits metallic behavior at all pressures. At \(P=0\), R as a function of T shows a superconducting transition, which shifts to lower temperatures with increasing pressure before vanishing at \(P=1.15\) GPa. However, superconductivity reappears at 1.8 GPa in the reentrant state SC2, occurring at notably lower temperatures relative to the first superconducting state, SC1. b Magnetoresistance of the 1T’-WS2 device when the magnetic field is oriented perpendicular to the bc-plane, plotted for different pressures. The superconducting transition shifts to lower fields upon increasing pressure, disappearing at \(P=1.15\) GPa and reappearing at 1.8 GPa, with a lower critical field when compared to SC1. c Magnetoresistance of the 1T’-WS2 device when the magnetic field is oriented along the c-axis of the crystal, shown for different pressures. Akin to the data in (b), the superconducting transition shifts to lower fields with increasing pressure in SC1 state. However, in contrast to the behavior observed for fields perpendicular to the bc plane, the superconducting transition in the SC2 state occurs at a similar temperature when compared to the SC1 state for fields oriented along the bc-plane. All data in (b and c) were collected at \(T=0.3\) K. Source data are provided as a Source Data file.
