Raman study of carrier-overdoping effects on the gap in high-Tc superconducting cuprates
T. Masui, M. Limonov, H. Uchiyama, S. Lee, S. Tajima, A. Yamanaka
DOI 10.1103/PhysRevB.68.060506 · 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
Raman scattering in the heavily overdoped (Y,Ca)Ba2Cu3O7−δ (Tc=65K) and Bi2Sr2CaCu2O8+δ (Tc=55K) crystals has been investigated. For both the crystals, the electronic pair-breaking peaks in the A1g and B1g polarizations were largely shifted to the low energies close to a half of 2Δ0, Δ0 being the maximum gap. It strongly suggests s-wave mixing into the d-wave superconducting order parameter and the consequent manifestation of the Coulomb screening effect in the B1g channel. Gradual mixing of s-wave component with overdoping is not due to the change of crystal structure symmetry but a generic feature in all high-Tc superconducting cuprates.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (Y,Ca)Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 65 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 55 | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | unknown |
| Bi2Sr2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 109 | Pressure not reported | unknown |
| Tl2Ba2CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Superconductivity-induced resonant Raman scattering in multilayer high-Tc superconductors
similarity 0.96Mikhail Limonov et al.
Source status unknown — claims are unverified
Systematic Raman study of effects of rare-earth substitution on the lattice modes of high-Tc superconductors
similarity 0.96H. J. Rosen et al.
Source status unknown — claims are unverified
Ultrafast Raman probe of the photoinduced superconducting to normal state transition in the cuprate Bi2Sr2CaCu2O8+δ
similarity 0.96Laurène Gatuingt et al.
Source status unknown — claims are unverified
Raman spectrum of the superconductor Bi2Sr2CaCu2O8
similarity 0.96J. Sapriel et al.
Source status unknown — claims are unverified
Temperature dependence of the linewidths of the Raman-active phonons of YBa2Cu3O7: Evidence for a superconducting gap between 440 and 500 cm−1
similarity 0.95K. F. McCarty et al.
Source status unknown — claims are unverified
Raman scattering from the Bi2Sr2CaCu3O8+y superconductor
similarity 0.95L. A. Farrow et al.
Source status unknown — claims are unverified