Pressure-induced phase transition for single-crystalline LaO0.5F0.5BiSe2
Pressure-induced phase transition for single-crystalline LaO0.5F0.5BiSe2
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单晶 LaO0.5F0.5BiSe2 的压力诱导相变
DOI：
10.1209/0295-5075/108/47007
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Y. Takano
中科院分区：
文献类型：
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作者：
M. Fujioka;Masashi Tanaka;S. Denholme;T. Yamaki;H. Takeya;T. Yamaguchi;Y. Takano
我们已经证明了在超导体LaO0.5F0.5BiSe2的单晶中从低Tc相到高Tc相的压力诱导相变。在2.44GPa下，高温超导相出现在6.7K。虽然低Tc相的各向异性估计为20，但在高Tc相中约减少一半（9.3）。这种趋势对于BiS2系统是相同的。LaO0.5F0.5BiSe2的Tc持续增加到本研究的最大压力（2.44 GPa）。因此，施加进一步的压力有可能在该系统中诱导更高的Tc。
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 is observed at 6.7 K under 2.44 GPa. Although the anisotropy 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, applying further pressure has the potential to induce a much higher Tc in this system.