Spin-fluctuation mechanism of superconductivity in cuprates
P. Prelovšek, A. Ramšak
DOI 10.1103/PhysRevB.72.012510 · Physical Review B
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Abstract
A theory of superconductivity within the extended t−J model, as relevant for cuprates, is developed. It is based on the equations of motion for projected fermionic operators and the mode-coupling approximation for the self-energy matrix. The dynamical spin susceptibility at various doping is considered as an input, extracted from experiments. The analysis shows that the superconductivity onset is dominated by the spin-fluctuation contribution. The coupling to spin fluctuations directly involves the next-nearest-neighbor hopping t′, hence Tc shows a pronounced dependence on t′. The latter can offer an explanation for the variation of Tc among different families of hole-doped cuprates.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2CuO4 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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