Physical properties and phase diagram of NaFe1?x Vx As

• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（1）
• 页码范围: 110-114
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/abcf95

摘要

We grew a series of NaFe1?x Vx 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 NaFeAs. 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?x Vx As.