Suppression of Antiferromagnetism in Electron-Doped Cuprate $T^{\prime }$-${\mathrm{La}}_{2-x}{\mathrm{Ce}}_x{\mathrm{CuO}}_{4\pm \delta }$

Abstract

We performed systematic angle-resolved photoemission spectroscopy measurements $in$-$situ$ on $T^{\prime }$-${\mathrm{La}}_{2-x}{\mathrm{Ce}}_x{\mathrm{CuO}}_{4\pm \delta }$ (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 -$t^{\prime }$ /$t$ in LCCO for the largest $\mathrm{L}{\mathrm{a}}^{3+}$ ionic radius among all the Lanthanide elements.

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Cited by in corpus (2)

• Continuously Doping Bi 2 Sr 2 CaCu 2 O 8+δ into Electron-Doped Superconductor by CaH 2 Annealing Method
• Inhomogeneous reduction-annealing effects on the electron-doped cuprate superconductor revealed by micro-focused angle-resolved photoemission spectroscopy