Pressure-induced phase transition for single crystalline LaO0.5F0.5BiSe2

Abstract

We have demonstrated a pressure-induced phase transition from a low-Tc phase to a high-Tc phase in a single crystal of the superconductor LaO0.5F0.5BiSe2. The high-Tc phase appears at 2.16 GPa and the maximum superconducting transition temperature (Tc) is observed at 6.7 K under 2.44 GPa. Although the anisotropy (γ) for the low-Tc phase is estimated to be 20, it is reduced by around half (9.3) in the high-Tc phase. This tendency is the same for the BiS2 system. The Tc of LaO0.5F0.5BiSe2 has continued to increase up to the maximum pressure of this study (2.44 GPa). Therefore applied further pressure has the potential to induce a much higher Tc in this system.

12 pages, 4 figures

References in corpus (10)

• Superconductivity Appears in the Vicinity of an Insulating-Like Behavior in CeO${}_{1-x}$F${}_x$BiS${}_2$
• Superconductivity of F-substituted LnOBiS2 (Ln = La, Ce, Pr, Nd, Yb) compounds
• Superconductivity induced by La doping in Sr1-xLaxFBiS2 system
• Evolution of superconductivity in LaO1-xFxBiS2 prepared by high pressure technique
• Physics and chemistry review of layered chalcogenide superconductors
• Stabilization of high-Tc phase of BiS2-based superconductor LaO0.5F0.5BiS2 using high-pressure synthesis
• First single crystal growth and structural analysis of superconducting layered bismuth oxyselenide; La(O,F)BiSe2
• Growth and superconducting anisotropies of F-substituted LaOBiSe2 single crystals
• High-Tc Phase of PrO0.5F0.5BiS2 single crystal induced by uniaxial pressure
• Pressure Tuned Enhancement of Superconductivity and Change of Ground State Properties in LaO0.5F0.5BiSe2 Single Crystals

Cited by in corpus (4)

• Site Selectivity on Chalcogen Atoms in Superconducting La(O,F)BiSSe
• Unusual mixed valence of Eu in two new materials EuSr2Bi2S4F4 and Eu2SrBi2S4F4: Mössbauer and X-ray photoemission Spectroscopy investigations
• Superconductivity and its Enhancement under High Pressure in "F-free" Single Crystals of CeOBiS${}_2$
• High pressure effects on non-fluorinated BiS2-based superconductors La${}_{1-x}$M${}_x$OBiS${}_2$ (M = Ti and Th)