Suppression of antiferromagnetic order in the electron-doped cuprate T′−La2−xCexCuO4±δ
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 · Physical Review B
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Abstract
We performed systematic angle-resolved photoemission spectroscopy measurements in situ on T′−La2−xCexCuO4±δ (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 (FS) volume, varied from 0.05 to 0.23, fully encompassing the superconducting dome. We observed an absence of the insulating behavior around n∼0.05 and the shift of FS reconstruction to n∼0.11 in LCCO from n∼0.15 in other electron-doped cuprates, suggesting that the antiferromagnetic order is strongly suppressed in this material. The possible explanation may lie in the enhanced next-nearest-neighbor hopping in LCCO because of the largest La3+ ionic radius among all the lanthanide elements.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xCexCuO4±δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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