Tunable superconductivity in parent cuprate Pr2CuO4±δ thin films

• 来源期刊: 中国物理B（英文版）
• 关键词: Pr2CuO4±δ thin film superconductivity polymer assisted deposition
• 年，卷（期）: 2019,（5）
• 页码范围: 320-326
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/28/5/057401

摘要

We studied the role of oxygen in Pr2CuO4±δ thin films fabricated by the polymer assisted deposition method. The magnetoresistance and Hall resistivity of Pr2CuO4±δ samples were systematically investigated. It was found that with decreasing oxygen content, the low-temperature Hall coefficient (RH) and magnetoresistance changed from negative to positive, similar to those with the increase of Ce-doped concentration in R2?x Cex CuO4 (R=La, Nd, Pr, Sm, Eu). In addition, we observed that the dependence of the superconducting critical temperature Tc with RH for the Pr2?x Cex CuO4 perfectly overlapped with that of Pr2CuO4±δ. These findings point to the fact that the doped electrons induced by the oxygen removal are responsible for the superconductivity of the T′-phase parent compounds.