Energy gap and Korringa constant in the high-temperature superconductor La1.83Sr0.17CuO4 determined by NMR
M. Lee, M. Yudkowsky, W. P. Halperin, J. Thiel, S. -J. Hwu, K. R. Poeppelmeier
DOI 10.1103/PhysRevB.36.2378 · Physical Review B
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Abstract
Polycrystalline samples of La1.83Sr0.17CuO4 were studied by pulsed nuclear-magnetic-resonance methods on the copper nucleus over a temperature range which included both normal and superconducting phases. A Korringa constant 14±1 K sec and a minimum value for the energy gap 2ΔkBTc=1.3±0.2 were found. A comparison of these results with the larger gap reported from infrared absorption and from tunneling experiments indicates that there is substantial anisotropy in the pairing interaction. Homogeneous line narrowing in the superconducting state was observed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.83Sr0.17CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37 | Pressure not reported | midpoint |
| La1.83Sr0.17CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37 | Pressure not reported | midpoint |
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