Muon-spin relaxation study of the spin correlations in the overdoped regime of electron-doped high-Tc cuprate superconductors
Malik A. Baqiya, Tadashi Adachi, Akira Takahashi, Takuya Konno, Taro Ohgi, Isao Watanabe, Yoji Koike
DOI 10.1103/PhysRevB.100.064514 · Physical Review B
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Abstract
In order to investigate the low-energy antiferromagnetic Cu-spin correlations and their relation to the superconductivity, we have performed muon-spin-relaxation (μSR) measurements using single crystals of the electron-doped high-Tc cuprate Pr1−xLaCexCuO4 in the overdoped regime. The μSR spectra have revealed that the Cu-spin correlations are developed in the overdoped samples where the superconductivity appears. The development of the Cu-spin correlations weakens with increasing x and is negligibly small in the heavily overdoped sample where the superconductivity almost disappears. Considering that the Cu-spin correlations also exist in the superconducting electron-doped cuprates in the undoped and underdoped regimes [T. Adachi et al., J. Phys. Soc. Jpn. 85, 114716 (2016)], our findings suggest that the mechanism of the superconductivity is related to the low-energy Cu-spin correlations in the entire doping regime of the electron-doped cuprates.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pr1-xLaCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure unresolved | onset |
| Pr1-xLaCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure unresolved | unknown |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Nd2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Pr2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Pr1.3-xLa0.7CexCuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La1.8Eu0.2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La1.9Y0.1CuO4 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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