Phase diagram of hole-doped high-Tc superconductors: Effects of Cooper-pair phase fluctuations within fluctuation-exchange theory
D. Manske, T. Dahm, K. H. Bennemann
DOI 10.1103/PhysRevB.64.144520 · Physical Review B
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Abstract
Using the Hubbard model Hamiltonian we study spin-fluctuation exchange-induced superconductivity of d-wave symmetry. Results are presented for the characteristic temperature T* at which a gap appears in the spectral density, for Tc* at which Cooper-pairs are formed, for Tc at which Cooper pairs become phase coherent, and for the superfluid density ns. We find that, with increasing doping, for x>0.15 the phase coherence energy becomes larger than the Cooper-pair condensation energy. Accordingly, one has Tc∝ns for x<0.15 and Tc∝Δ for the overdoped cuprates. We use our results to discuss dynamics and recent dynamical conductivity and ultrafast nonequilibrium measurements.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CuO2 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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