论文标题
Yttrium-Cerium-Cerium氢化物中的合成和超导性
Synthesis and Superconductivity in Yttrium-Cerium Hydrides at Moderate Pressures
论文作者
论文摘要
受Yttrium Superydride的高临界温度和超导谷物超级盐水的低稳定压力的启发，我们进行了四次独立的跑步，以合成Yttrium-Cerium-Cery Hydrides。通过拉曼散射和X射线衍射测量结果检查的相。在临界温度的零抗性状态下，在97-140 K的压力范围内检测到超导率，范围从114 GPA到120 $ \ pm $ 4 GPA。合成的氢化物的最高临界温度大于报告的氢化氢盐，而相应的稳定压力远低于超导Yttrium氢化物的最大稳定压力。结构分析和理论计算表明，y $ _ {0.5} $ ce $ _ {0.5} $ h $ _9 $的阶段具有空间$ p6_3/mmc $，计算出的临界温度为119 K，并与实验公平协议。这些结果表明，在许多实验室可以使用的适度压力下，合金的超水可以保持相对较高的临界温度。
Inspired by the high critical temperature in yttrium superhydride and the low stabilized pressure in superconducting cerium superhydride, we carry out four independent runs to synthesize yttrium-cerium alloy hydrides. The phases examined by the Raman scattering and x-ray diffraction measurements. The superconductivity is detected with the zero-resistance state at the critical temperature in the range of 97-140 K at pressures ranging from 114 GPa to 120$\pm$4 GPa. The maximum critical temperature of the synthesized hydrides is larger than those reported for cerium hydrides, while the corresponding stabilized pressure is much lower than those for superconducting yttrium hydrides. The structural analysis and theoretical calculations suggest that the phase of Y$_{0.5}$Ce$_{0.5}$H$_9$ has the space group $P6_3/mmc$ with the calculated critical temperature of 119 K, in fair agreement with the experiments. These results indicate that alloying superhydrides indeed can maintain relatively high critical temperature at modest pressures accessible by many laboratories.
