Doping dependence of the gap anisotropy of the high-temperature YBa2Cu3O7−δ superconductor
K. Nakayama, T. Sato, K. Terashima, T. Arakane, T. Takahashi, M. Kubota, K. Ono, T. Nishizaki, Y. Takahashi, N. Kobayashi
DOI 10.1103/PhysRevB.79.140503 · Physical Review B
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Abstract
We have performed high-resolution angle-resolved photoemission spectroscopy of YBa2Cu3O7−δ with various hole concentrations from under-to-optimal doping. We have determined the momentum dependence of bulk superconducting gap as a function of hole concentration and found the enhancement of antinodal gap, the deviation from simple dx2−y2 wave, and the reduction of superconducting coherence weight in the underdoped region. We also found the universality of the doping dependence of the SC-gap size and symmetry in bilayered cuprates. These results suggest the importance of the long-range pairing interactions in the underdoped region.
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. | 60 | Pressure not reported | unknown |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | unknown |
| YBa2Cu3O7-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. | 80 | Pressure not reported | onset |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-xBaxCuO4 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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