Temperature dependence of the order parameter of cuprate superconductors
Alexander Mihlin, Assa Auerbach
DOI 10.1103/PhysRevB.80.134521 · Physical Review B
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Abstract
A model of charged hole-pair bosons with long-range Coulomb interactions and very weak interlayer coupling is used to calculate the order parameter Φ of underdoped cuprates. Model parameters are extracted from experimental superfluid densities and plasma frequencies. The temperature dependence Φ(T) is characterized by a “trapezoidal” shape. At low temperatures, it declines slowly due to harmonic phase fluctuations which are suppressed by anisotropic plasma gaps. Above the single layer Berezinski-Kosterlitz-Thouless temperature, Φ(T) falls rapidly toward the three-dimensional transition temperature. The theoretical curves are compared to c-axis superfluid density data by Kitano et al. [J. Low Temp. Phys. 117, 1241 (1999)] and to the transverse nodal velocity measured by angular resolved photoemission spectra on BSCCO samples by Lee et al. [Nature (London) 450, 81 (2007)] and by Kanigel et al. [Phys. Rev. Lett. 99, 157001 (2007)].
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | unknown |
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