High-Tc Phase of PrO0.5F0.5BiS2 single crystal induced by uniaxial pressure

Abstract

We demonstrated a pressure-induced phase transition from a low-Tc phase (3.5 K) to a high-Tc phase (8.7 K) in single crystalline PrO0.5F0.5BiS2. The high-Tc phase is easily observed even at 0.7 GPa by uniaxial pressure obtained from a geometric effect of a single crystal with an extremely-thin thickness. For this phase transition, superconducting anisotropy and the coherence length along the c axis change from γ = 20 to 9.3 and from ξc = 0.56 to 0.71 nm respectively. It is suggested that a shrinkage in the c lattice constant by applied uniaxial pressure enhances the three dimensionality in the superconducting state.

arXiv comment12 pages, 4 figures, Appl. Phys. Lett., accepted

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• Synthesis and properties of SmO0.5F0.5BiS2 and enhancement in Tc in La1-ySmyO0.5F0.5BiS2
• Site Selectivity on Chalcogen Atoms in Superconducting La(O,F)BiSSe
• Effect of hydrostatic pressures on the superconductivity of new BiS2 based REO0.5F0.5BiS2 (RE-La, Pr and Nd) superconductors
• Superconductivity and its Enhancement under High Pressure in "F-free" Single Crystals of CeOBiS${}_2$
• Pressure-Induced Superconductivity in BiS2-based EuFBiS2
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• Pressure-induced phase transition for single crystalline LaO0.5F0.5BiSe2
• Enhancement of Tc in BiS2 based superconductors NdO0.7F0.3BiS2 by substitution of Pb for Bi
• Superconductivity in La1-xSmxO0.5F0.5BiS2 (x = 0.2, 0.8) under hydrostatic pressure
• Pressure-induced enhancement of two-dimensionality in LaO1-xFxBi(Se/S)2 superconductors