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Tunable superconductivity in parent cuprate Pr2CuO4±δ thin films |
| Xinjian Wei(魏鑫健)1,2, Ge He(何格)1,2, Wei Hu(胡卫)1,2, Xu Zhang(张旭)1,2, Mingyang Qin(秦明阳)1,2, Jie Yuan(袁洁)1,3, Beiyi Zhu(朱北沂)1, Yuan Lin(林媛)4, Kui Jin(金魁)1,2,3,5 |
1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
3 Songshan Lake Materials Laboratory, Guangdong 523808, China;
4 State Key Laboratory of Electronic Thin Films and Integrated Devices & Center for Information in Medicine, University of Electronic Science and Technology of China, Chengdu 610054, China;
5 Collaborative Innovation Center of Quantum Matter, Beijing 100190, China |
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Abstract 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-xCexCuO4 (R=La, Nd, Pr, Sm, Eu). In addition, we observed that the dependence of the superconducting critical temperature Tc with RH for the Pr2-xCexCuO4 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.
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Received: 08 January 2019
Revised: 21 February 2019
Accepted manuscript online:
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PACS:
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74.72.Ek
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(Electron-doped)
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81.15.-z
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(Methods of deposition of films and coatings; film growth and epitaxy)
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73.50.-h
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(Electronic transport phenomena in thin films)
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| Fund: Project supported by the National Key Basic Research Program of China (Grant Nos. 2015CB921000, 2016YFA0300301, 2017YFA0303003, and 2018YFB0704100), the National Natural Science Foundation of China (Grant Nos. 11674374 and 11474338), the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences (Grant No. QYZDB-SSW-SLH008), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grants Nos. XDB07020100 and XDB07030200), and the Beijing Municipal Science and Technology Project, China (Grant No. Z161100002116011). |
Corresponding Authors:
Kui Jin
E-mail: kuijin@iphy.ac.cn
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Cite this article:
Xinjian Wei(魏鑫健), Ge He(何格), Wei Hu(胡卫), Xu Zhang(张旭), Mingyang Qin(秦明阳), Jie Yuan(袁洁), Beiyi Zhu(朱北沂), Yuan Lin(林媛), Kui Jin(金魁) Tunable superconductivity in parent cuprate Pr2CuO4±δ thin films 2019 Chin. Phys. B 28 057401
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