Superconductivity in La1-xSmxO0.5F0.5BiS2 (x = 0.2, 0.8) under hydrostatic pressure
arXiv:1507.03722 · doi:10.1088/0022-3727/49/27/275002
Abstract
We have investigated the pressure effect on the newly discovered samarium doped La1-xSmxO0.5F0.5BiS2 superconductors. More than threefold increase in Tc (10.3 K) is observed with external pressure (at ~1.74 GPa at a rate of 4.08 K/GPa)) for x = 0.2 composition. There is a concomitant large improvement in the quality of the superconducting transition. Beyond this pressure Tc decreases monotonously at the rate of -2.09 K/GPa. In the x = 0.8 sample, we do not observe any enhancement in Tc with application of pressure (up to 1.76 GPa). The semiconducting behavior observed in the normal state resistivity of both of the samples is significantly subdued with the application of pressure which, if interpreted invoking thermal activation process, implies that the activation energy gap of the carriers is significantly reduced with pressure. We believe these observations should generate further interest in the La1-xSmxO0.5F0.5BiS2 superconductors.
17 pages, 5 figures
References in corpus (20)
- Superconductivity in iron-based F-doped layered quaternary compound Nd[O1-xFx]FeAs
- Pressure-driven dome-shaped superconductivity and electronic structural evolution in tungsten ditelluride
- Superconductivity Appears in the Vicinity of an Insulating-Like Behavior in CeOFBiS
- Superconductivity of F-substituted LnOBiS2 (Ln = La, Ce, Pr, Nd, Yb) compounds
- Superconductivity induced by La doping in Sr1-xLaxFBiS2 system
- Pressure Study of BiS2-Based Superconductors Bi4O4S3 and La(O,F)BiS2
- Pressure-induced Enhancement of Superconductivity in BiS-layered LaOFBiS
- Evolution of superconductivity in LaO1-xFxBiS2 prepared by high pressure technique
- High pressure synthesis of late rare earth RFeAs(O,F) superconductors; R = Tb and Dy
- Enhancement of superconductivity near the pressure-induced semiconductor-metal transition in BiS2-based compounds LnO(0.5)F(0.5)BiS2 (Ln = La, Ce, Pr, Nd)
- Appearance of bulk Superconductivity under Hydrostatic Pressure in Sr0.5RE0.5FBiS2 (RE = Ce, Nd, Pr and Sm) compounds
- Impact of hydrostatic pressure on superconductivity of Sr0.5La0.5FBiS2
- Synthesis and properties of SmO0.5F0.5BiS2 and enhancement in Tc in La1-ySmyO0.5F0.5BiS2
- Coexistence of superconductivity and ferromagnetism in Sr0.5Ce0.5FBiS2
- Effect of hydrostatic pressures on the superconductivity of new BiS2 based REO0.5F0.5BiS2 (RE-La, Pr and Nd) superconductors
- High-Tc Phase of PrO0.5F0.5BiS2 single crystal induced by uniaxial pressure
- Effect of high pressure annealing on the normal state transport of LaO0.5F0.5BiS2
- Bulk superconductivity in single phase Bi3O2S3
- Pressure-induced phase transition for single crystalline LaO0.5F0.5BiSe2
- Chemical pressure effect on Tc in BiS2-based Ce1-xNdxO0.5F0.5BiS2