Physical Properties of SmS Metallic Phase at Low temperature

Abstract

The resistivity of SmS single crystal has been measured under pressure up to 8 GPa. As an applied pressure is increased, the electrical resistivity changes drastically. In particular it shows a kink at T_M in the p vs T curve above 2 GPa. We found that the electrical resistivity shows the ρ=ρ₀+AT₂ dependencewith a largecoefficient Abelow T_M. If we ascribe this term to the electron-electron scattering, the electron correlation effect plays a dominant role in the high pressure region, which may correspond to the large γ value.