论文标题
无限层$ \ mathrm的相图和超导圆顶
Phase diagram and superconducting dome of infinite-layer $\mathrm{Nd_{1-x}Sr_{x}NiO_{2}}$ thin films
论文作者
论文摘要
合成并研究了Infinite-Layer ND1-XSRXNIO2薄膜，SR掺杂级为0.08至0.3。我们发现，一个超导圆顶在0.12至0.235之间，伴随着弱化的行为和不被置换的态度的弱绝缘行为。该圆顶类似于在电子掺杂的214型和无限层的铜层超导体中。对于高于0.18的X，随着温度降低，正常的州厅系数（$ r_ {h} $）将符号从负数变为正。符号的温度随着X的侧面降低而单调降低，并在中点接近超导圆顶，这表明随着圆顶中心的掺杂剂浓度的变化，费米表面的重建。
Infinite-layer Nd1-xSrxNiO2 thin films with Sr doping level x from 0.08 to 0.3 were synthesized and investigated. We found a superconducting dome to be between 0.12 and 0.235 which is accompanied by a weakly insulating behaviour in both underdoped and overdoped regimes. The dome is akin to that in the electron-doped 214-type and infinite-layer cuprate superconductors. For x higher than 0.18, the normal state Hall coefficient ($R_{H}$) changes the sign from negative to positive as the temperature decreases. The temperature of the sign changes monotonically decreases with decreasing x from the overdoped side and approaches the superconducting dome at the mid-point, suggesting a reconstruction of the Fermi surface as the dopant concentration changes across the center of the dome.
