Huang J, Zhang C, Ma Y H, Wang T, Mu G, Yu L, Hu T, Xiao H
Kunming University of Science and Technology, Kunming 650093, People's Republic of China. Center for High Pressure Science and Technology Advanced Research, Beijing 100094, People's Republic of China.
J Phys Condens Matter. 2019 Aug 14;31(32):325602. doi: 10.1088/1361-648X/ab1ef6. Epub 2019 May 2.
Systematic measurements of electrical resistivity and Hall coefficient under high pressure were performed on CaFeCoAsF single crystal samples. The superconductivity is suppressed quickly by pressure and can not be detected down to 2 K at above 12.7 GPa, while the magnitude of the Hall coefficient [Formula: see text] shows a very weak pressure and temperature dependence. A comprehensive analysis considering the pressure dependence of [Formula: see text], [Formula: see text], residual resistivity ratio, and the Fermi-liquid term of the resistivity indicates that the electron correlation is an important factor in superconductivity of iron-based superconductors.
对CaFeCoAsF单晶样品进行了高压下电阻率和霍尔系数的系统测量。超导性被压力迅速抑制，在高于12.7 GPa时，降至2 K也无法检测到超导性，而霍尔系数[公式：见正文]的大小显示出非常微弱的压力和温度依赖性。综合考虑[公式：见正文]、[公式：见正文]的压力依赖性、剩余电阻率比以及电阻率的费米液体项进行分析表明，电子关联是铁基超导体超导性的一个重要因素。
