Quantitative Raman measurement of the evolution of the Cooper-pair density with doping in Bi2Sr2CaCu2O8+δ superconductors
S. Blanc, Y. Gallais, A. Sacuto, M. Cazayous, M. A. Méasson, G. D. Gu, J. S. Wen, Z. J. Xu
DOI 10.1103/PhysRevB.80.140502 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We report Raman measurements on Bi2Sr2CaCu2O8+δ single crystals that allow us to quantitatively evaluate the doping dependence of the density of Cooper pairs in the superconducting state. We show that the drastic loss of Cooper pairs in the antinodal region as the doping level is reduced is concomitant with a deep alteration of the quasiparticles dynamic above Tc and consistent with a pseudogap that competes with superconductivity. Our data also reveal that the overall density of Cooper pairs evolves with doping, distinctly from the superfluid density above the doping level pc=0.2.
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. | 68 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 84 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 70 | Pressure not reported | unknown |
Similar papers
Effect of out-of-plane disorder on superconducting gap anisotropy in Bi2+xSr2−xCaCu2O8+δ as seen via Raman spectroscopy
similarity 0.97N. Murai et al.
Source status unknown — claims are unverified
Pair breaking versus symmetry breaking: Origin of the Raman modes in superconducting cuprates
similarity 0.97N. Munnikes et al.
Source status unknown — claims are unverified
Three energy scales in the superconducting state of hole-doped cuprates detected by electronic Raman scattering
similarity 0.96S. Benhabib et al.
Source status unknown — claims are unverified
Raman scattering from the Bi2Sr2CaCu3O8+y superconductor
similarity 0.96L. A. Farrow et al.
Source status unknown — claims are unverified
Superconductivity-induced phonon anomalies in high-Tc superconductors: A Raman intensity study
similarity 0.96O. V. Misochko et al.
Source status unknown — claims are unverified
Superconducting Fluctuations in Overdoped Bi2Sr2CaCu2O8+δ
similarity 0.96Yu He et al.
Source status unknown — claims are unverified