Suppression of Antiferromagnetism in Electron-Doped Cuprate $T'$-${\rm La}_{2-x}{\rm Ce}_x\rm {CuO}_{4\pm\delta}$

C. Y. Tang; Z. F. Lin; J. X. Zhang; X. C. Guo; J. Y. Guan; S. Y. Gao; Z. C. Rao; J. Zhao; Y. B. Huang; T. Qian; Z. Y. Weng; K. Jin; Y. J. Sun; H. Ding

doi:10.1103/physrevb.104.155125

arXiv · 2106.05551

Suppression of Antiferromagnetism in Electron-Doped Cuprate $T'$-${\rm La}_{2-x}{\rm Ce}_x\rm {CuO}_{4\pm\delta}$

C. Y. Tang·Z. F. Lin·J. X. Zhang·X. C. Guo·J. Y. Guan·S. Y. Gao·Z. C. Rao·J. Zhao·Y. B. Huang·T. Qian·Z. Y. Weng·K. Jin·Y. J. Sun·H. Ding

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Abstract

We performed systematic angle-resolved photoemission spectroscopy measurements $in$-$situ$ on $T'$-${\rm La}_{2-x}{\rm Ce}_x\rm {CuO}_{4\pm\delta}$ (LCCO) thin films over the extended doping range prepared by the refined ozone/vacuum annealing method. Electron doping level ($n$), estimated from the measured Fermi surface volume, varies from 0.05 to 0.23, which covers the whole superconducting dome. We observed an absence of the insulating behavior around $n \sim$ 0.05 and the Fermi surface reconstruction shifted to $n \sim$ 0.11 in LCCO compared to that of other electron-doped cuprates at around 0.15, suggesting that antiferromagnetism is strongly suppressed in this material. The possible explanation may lie in the enhanced -$t'$ /$t$ in LCCO for the largest $\rm{La^{3+}}$ ionic radius among all the Lanthanide elements.

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C. Y. Tang, Z. F. Lin, J. X. Zhang, X. C. Guo, J. Y. Guan, S. Y. Gao, Z. C. Rao, J. Zhao, Y. B. Huang, T. Qian, Z. Y. Weng, K. Jin, Y. J. Sun, H. Ding. 2021-06-10. Suppression of Antiferromagnetism in Electron-Doped Cuprate $T'$-${\rm La}_{2-x}{\rm Ce}_x\rm {CuO}_{4\pm\delta}$. https://doi.org/10.1103/physrevb.104.155125

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