Breakpoint in the evolution of the gap through the cuprate phase diagram
W. Guyard, M. Le Tacon, M. Cazayous, A. Sacuto, A. Georges, D. Colson, A. Forget
DOI 10.1103/PhysRevB.77.024524 · 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
The actual physical origin of the gap at the antinodes and a clear identification of the superconducting gap are fundamental open issues in the physics of high-Tc superconductors. Here, we present a systematic electronic Raman scattering study of a mercury-based single layer cuprate as a function of both doping level and temperature. On the deeply overdoped side, we show that the antinodal gap is a true superconducting gap. In contrast, on the underdoped side, our results reveal the existence of a breakpoint close to optimal doping, below which the antinodal gap is gradually disconnected from superconductivity. The nature of both the superconducting and normal states is distinctly different on each side of this breakpoint.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| HgBa2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | unknown |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 83 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 82 | Pressure not reported | unknown |
Similar papers
Evolution of low-temperature phases in a low-temperature structural transition of a La cuprate
similarity 0.95Y. Inoue et al.
Source status unknown — claims are unverified
Hartree-Fock computation of the high-Tc cuprate phase diagram
similarity 0.95R. B. Laughlin
Source status unknown — claims are unverified
Strain effects on point defects and chain-oxygen order-disorder transition in 123 cuprate compounds
similarity 0.95Haibin Su et al.
Source status unknown — claims are unverified
Evidence for a generic quantum transition in high-Tc cuprates
similarity 0.95C. Panagopoulos et al.
Source status unknown — claims are unverified
Midgap surface states as a novel signature for dxa2-xb2-wave superconductivity
similarity 0.94Chia-Ren Hu
Source status unknown — claims are unverified
Robustness of the midgap states predicted to exist on a {110} surface of a dxa2-xb2-wave superconductor
similarity 0.94Jian Yang & Chia-Ren Hu
Source status unknown — claims are unverified