2018/07/03 by Xinjian Wei, Ge He, Wei Hu +6
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Cuprate #Magnetic and transport properties of perovskites and related materials #Materials science #Nanotechnology #Physics #Physics of Superconductivity and Magnetism #Superconductivity #Thin film #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.1088/1674-1056/28/5/057401
5 pages, 5 figures. Related publication: Phys.Rev.B 96,104518(2017)
arxiv created 2018/07/03 · openalex created_date 2018/07/10 · openalex publication_date 2019/05/01 · arxiv updated 2019/09/04 · openalex updated_date 2026/08/05
Abstract We studied the role of oxygen in Pr 2 CuO 4± δ thin films fabricated by the polymer assisted deposition method. The magnetoresistance and Hall resistivity of Pr 2 CuO 4± δ samples were systematically investigated. It was found that with decreasing oxygen content, the low-temperature Hall coefficient ( R H ) and magnetoresistance changed from negative to positive, similar to those with the increase of Ce-doped concentration in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>R</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>2</mml:mn> <mml:mo>−</mml:mo> <mml:mi>x</mml:mi> </mml:mrow> </mml:msub> </mml:math> Ce x CuO 4 ( R =La, Nd, Pr, Sm, Eu). In addition, we observed that the dependence of the superconducting critical temperature T c with R H for the Pr 2− x Ce x CuO 4 perfectly overlapped with that of Pr 2 CuO 4± δ . These findings point to the fact that the doped electrons induced by the oxygen removal are responsible for the superconductivity of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msup> <mml:mrow> <mml:mi>T</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>′</mml:mo> </mml:mrow> </mml:msup> </mml:math> -phase parent compounds.