80 research outputs found
Pressure-induced phase transition for single crystalline LaO0.5F0.5BiSe2
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 ({\gamma}) 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.Comment: 12 pages, 4 figure
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