Doping-dependent reduction of the Cu nuclear magnetic resonance intensity in the electron-doped superconductors
G. V. M. Williams, J. Haase, Min-Seok Park, Kyung Hee Kim, Sung-Ik Lee
DOI 10.1103/PhysRevB.72.212511 · Physical Review B
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Abstract
Cu63 nuclear magnetic resonance (NMR) measurements on the electron-doped high-temperature superconducting cuprate (HTSC), Sr0.9La0.1CuO2, reveal a systematic and large reduction of the Cu NMR signal for temperatures below ∼180K. However, a large reduction is not observed for temperatures as low as 6K in Pr1.85Ce0.15CuO4 that has a higher number of doped electrons per Cu. The reduction of the Cu NMR intensity arises from a spatially inhomogeneous and sudden slowing down of the electron spin dynamics that has been observed in underdoped and hole-doped HTSCs. Our results suggest a correspondence with the hole-doped HTSCs where a large wipeout of the Cu NMR signal is only observed for less than ∼0.13 doped carriers per Cu.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sr0.9La0.1CuO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 43 | Pressure not reported | unknown |
| Pr1.85Ce0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 20 | Pressure not reported | unknown |
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