Interplane Electronic Spin Polarization Transfer in the Superconducting State of Y2Ba4Cu7O15 as revealed by NQR Spin-Echo Double Resonance
A. Suter, M. Mali, J. Roos, D. Brinkmann
DOI 10.1103/PhysRevLett.82.1309 · Physical Review Letters
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Abstract
We report a spin-echo double resonance study of the plane Cu sites in the superconducting state of nearly optimally doped Y2Ba4Cu7O15 employing nuclear quadrupole resonance. The detailed analysis of the temperature dependence of the indirect in-plane and interplane spin-spin relaxation rate reveals two results: (i) In the normal conducting state, strong antiferromagnetic correlations exist between adjacent CuO2 layers. (ii) In the superconducting state, the electronic spin polarization transfer between these layers is drastically reduced for decreasing temperature. Both findings are consistent with the interlayer tunneling model.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Y2Ba4Cu7O15 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93.1 | Pressure not reported | onset |
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