Electronic inhomogeneity, fluctuations, and thermodynamic transitions in cuprate superconductors
J. W. Loram, J. L. Tallon
DOI 10.1103/PhysRevB.79.144514 · Physical Review B
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Abstract
The apparent electronic inhomogeneity in the cuprate superconductor Bi2Sr2CaCu2O8+δ inferred from scanning tunneling spectroscopy should induce broadening of the thermodynamic transition. Because observed thermodynamic transition widths are actually rather narrow the question has been raised as to whether the inclusion of fluctuations might sharpen the computed transition for an inhomogeneous system. We have modeled a distributed mean-field step combined with fluctuations and show that the transition is not sharpened by fluctuations. The spread of Tc values inferred from our analysis is significantly less than that implied by pairing inhomogeneity and, along with many other observations, brings into question this interpretation.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+δ 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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