Pressure-induced high-temperature superconductivity is observed in semiconducting (SnxEu1-x)yMo6S8, where 0<~x<~0.1 and y=1.0 and 1.2, having a carrier concentration ≃1019/cm3 at 4.2 K as determined from Hall-effect measurements. Above a threshold pressure ≃7 kbar, superconductivity appears with dTc/dP≃2 K/kbar. The maximum superconducting temperature (Tc∼10 K), reached at ∼ 12 kbar, represents the highest pressure-induced Tc in any semiconductor. For P>~13 kbar, the temperature-dependent resistance appears metallic.
Observation of the Transition from Semiconductor to High-Tc Superconductor in (SnxEu1-X)YMo6S8 Under High PressurePhysical Review Letters
Publisher's StatementCopyright 1981 American Physical Society. Available on publisher's site at http://link.aps.org/doi/10.1103/PhysRevLett.46.280.
Citation InformationHarrison, D. W. , K. C. Lim, J. D. Thompson, C. Y. Huang, Paul D. Hambourger, and H. L. Luo. "Observation of the Transition from Semiconductor to High-Tc Superconductor in (SnxEu1-X)YMo6S8 Under High Pressure." Physical Review Letters 46 (1981): 280-283.