High-resolution angle-resolved photoemission spectroscopy of the momentum dependence of the superconducting gap in Bi2Sr2CaCu2O8
T. Yokoya, T. Takahashi, T. Mochiku, K. Kadowaki
DOI 10.1103/PhysRevB.53.14055 · Physical Review B
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Abstract
The momentum dependence of the superconducting gap in Bi2Sr2CaCu2O8 has been studied using high-resolution angle-resolved photoemission spectroscopy with nonpolarized light. The size of the superconducting gap obtained at several points on the Fermi surface shows a linear dependence with respect to the gap function of the dx2−y2 wave defined as 0.5|coskxa−coskya|. This suggests that the anomaly in the superconducting gap observed with polarized synchrotron-radiation light is not intrinsic, being probably due to the superstructure of the BiO plane, and rather the strong anisotropy of the superconducting gap, like the dx2−y2 symmetry, is intrinsic.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 86.4 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 86.4 | Pressure not reported | unknown |
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