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arXiv · 1406.3888

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

Masaya Fujioka·Masanori Nagao·Saleem J. Denholme·Masashi Tanaka·Hiroyuki Takeya·Takahide Yamaguchi·Yoshihiko Takano
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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.

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Masaya Fujioka, Masanori Nagao, Saleem J. Denholme, Masashi Tanaka, Hiroyuki Takeya, Takahide Yamaguchi, Yoshihiko Takano. 2014-07-19. High-Tc Phase of PrO0.5F0.5BiS2 single crystal induced by uniaxial pressure. https://doi.org/10.1063/1.4891197

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