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We grew a series of NaFe1-xVx As(0 ≤ x ≤ 0.03) single crystals and performed the measurements of resistance,magnetic susceptibility, and specific heat to study the superconducting phase diagram by doping V into Na Fe As. Both the structural and the spin-density-wave(SDW) transitions are slightly suppressed by V-doping. While superconducting transition temperature is enhanced to the maximum value of 15 K when the optimal doping level x = 0.007 and then is suppressed rapidly with further V-doping, displaying a small superconducting dome. Our results suggest that V-impurities should act as strong magnetic scattering centers which cause the sharp suppression of superconductivity in NaFe1-xVx As. 相似文献
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何鑫 张昌玲 李芷文 张思佳 闵保森 张俊 卢可 赵建发 史鲁川 彭毅 望贤成 冯少敏 宋静 王鲁红 V.B.Prakapenka S.Chariton 刘浩哲 靳常青 《中国物理快报》2023,(5):135-138
We report experimental discovery of tantalum polyhydride superconductor.It was synthesized under highpressure and high-temperature conditions using diamond anvil cell combined with in situ high-pressure laser heating techniques.The superconductivity was investigated via resistance measurements at pressures.The highest superconducting transition temperature Tc was found to be ~30 K at 197 GPa in the sample that was synthesized at the same pressure with ~2000 K heating.The transitions a... 相似文献
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