The H-T and P-T Phase Diagram of the Superconducting Phase in Pd:Bi2Te3

We study the magnetic field vs. temperature (H – T) and pressure vs. temperature (P – T) phase diagrams of the Tc ≈ 5.5 K superconducting phase in PdxBi2Te3 (x ≈ 1) using electrical resistivity versus temperature measurements at various applied magnetic fields (H) and magnetic susceptibility versus temperature measurements at various applied magnetic fields (H) and pressure (P). The H – T phase diagram has an initial upward curvature as observed in some unconventional superconductors. The critical field extrapolated to T = 0 K is Hc(0) ≈ 6–10 kOe. The Tc is suppressed approximately linearly with pressure at a rate dTc/dP ≈ −0.28 K/GPa.