Fermi surface and superconducting gap in superstructure-free Bi1.80Pb0.38Sr2.01CuO6−δ
T. Sato, T. Kamiyama, Y. Naitoh, T. Takahashi, I. Chong, T. Terashima, M. Takano
DOI 10.1103/PhysRevB.63.132502 · Physical Review B
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Abstract
We report an ultrahigh-resolution angle-resolved photoemission spectroscopy on superstructure-free Bi1.80Pb0.38Sr2.01CuO6−δ with various hole concentrations. The Fermi surface retains a holelike character centered at (π, π) from under- to overdoping. The superconducting gap exhibits a dx2−y2-like anisotropy with a typical gap value of 10–15 meV near (π, 0). Comparison with Bi2Sr2CaCu2O8 shows that the size of the superconducting gap and the energy of the hump structure near EF are well scaled with the maximum Tc(Tcmax). This suggests that the superconducting properties are essentially characterized by Tcmax irrespective of the number of CuO2 layers or the BiO superstructure.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi1.80Pb0.38Sr2.01CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 18 | Pressure not reported | unknown |
| Bi1.80Pb0.38Sr2.01CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 19 | Pressure not reported | unknown |
| Bi1.80Pb0.38Sr2.01CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13 | Pressure not reported | unknown |
| Bi1.80Pb0.38Sr2.01CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 18 | Pressure not reported | unknown |
| Bi1.80Pb0.38Sr2.01CuO6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 19 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
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