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Anomalous in-plane magnetoresistance of electron-doped cuprate La2−xCexCuO4±δ

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journal contribution
posted on 08.06.2017, 12:51 by H.S. Yu, G. He, Yanli Jia, X. Zhang, J. Yuan, Beiyi Zhu, Anna KusmartsevaAnna Kusmartseva, Feodor Kusmartsev, K. Jin
We report systematic in-plane magnetoresistance measurements on the electron-doped cuprate La2−xCexCuO4±δ thin films as a function of Ce doping and oxygen content in the magnetic field up to 14T. A crossover from negative to positive magnetoresistance occurs between the doping level x = 0.07 and 0.08. Above x = 0.08, the positive magnetoresistance effect appears, and is almost indiscernible at x = 0.15. By tuning the oxygen content, the as-grown samples show negative magnetoresistance effect, whereas the optimally annealed ones display positive magnetoresistance effect at the doping level x = 0.15. Intriguingly, a linear-field dependence of in-plane magnetoresistance is observed at the underdoping level x = 0.06, the optimal doping level x = 0.1 and slightly overdoping level x = 0.11. These anomalies of in-plane magnetoresistance may be related to the intrinsic inhomogeneity in the cuprates, which is discussed in the framework of network model.

Funding

This work was supported by the National Key Basic Research Program of China (Grant Nos. 2015CB921000, and 2016YFA0300301), the National Natural Science Foundation of China (Grant Nos. 11674374, and 11474338), and the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (Grant No. QYZDB-SSW-SLH008)

History

School

  • Science

Department

  • Physics

Published in

Science China Physics, Mechanics & Astronomy

Volume

60

Citation

YU, H.S. ... et al, 2017. Anomalous in-plane magnetoresistance of electron-doped cuprate La2−xCexCuO4±δ. Science China Physics, Mechanics & Astronomy, 60 (9), 097411.

Publisher

© Science China Press and Springer

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

19/05/2017

Publication date

2017

Notes

This is a post-peer-review, pre-copyedit version of an article published in Science China Physics, Mechanics & Astronomy. The final authenticated version is available online at: http://dx.doi.org/10.1007/s11433-017-9050-7.

ISSN

1674-7348

eISSN

1869-1927

Language

en