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.

References in corpus (3)

• Low energy theory of the t-t'-t''-U Hubbard Model at half-filling: interaction strengths in cuprate superconductors and an effective spin-only description of La_2CuO_4
• Fermi Surface reconstruction and anomalous low temperature resistivity in electron-doped La2-xCexCuO4
• Understanding electron-doped cuprate superconductors as hole superconductors