Paramagnonlike excitations and spin diffusion in magnetic resonance studies of copper oxide superconductors
Igor A. Larionov
DOI 10.1103/PhysRevB.76.224503 · Physical Review B
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Abstract
The relaxation function theory for a doped two-dimensional Heisenberg antiferromagnetic system in the paramagnetic state for all wave vectors through the Brillouin zone is presented in view of the low frequency response of high-Tc copper oxide superconductors. We deduced the regions of long lifetime [T≲400(1−4x)K] and “overdamped” [T≳700(1−4x)K] paramagnonlike excitations in the temperature (T)-doping index (x) phase diagram from plane oxygen nuclear spin-lattice relaxation rate (1∕T1)17 data right up to optimally doped La2−xSrxCuO4, thus providing the regimes for the spin-wave concept and the overdamped mode.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O6.35 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 18 | Pressure not reported | unknown |
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