Relation between the Superconducting Gap Energy and the Two-Magnon Raman Peak Energy in Bi2Sr2Ca1−xYxCu2O8+δ
S. Sugai, T. Hosokawa
DOI 10.1103/PhysRevLett.85.1112 · Physical Review Letters
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Abstract
The relation between the electronic excitation and the magnetic excitation for the superconductivity in Bi2Sr2Ca1−xYxCu2O8+δ was investigated by wide-energy Raman spectroscopy. In the underdoping region the B1g scattering intensity is depleted below the two-magnon peak energy due to the charge-spin interactions. The depleted region decreases according to the decrease of the two-magnon peak energy, as the carrier concentration increases. This two-magnon peak energy also determines the B1g superconducting gap energy as 2Δ≈αħωtwo−magnon≈Jeff (α=0.34–0.41) from under to overdoping hole concentration.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2Ca1-xYxCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 84 | Pressure not reported | midpoint |
| Bi2Sr2Ca1-xYxCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 95 | Pressure not reported | unknown |
| Bi2Sr2Ca1-xYxCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 87 | Pressure not reported | unknown |
| Bi2Sr2Ca1-xYxCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 75 | Pressure not reported | unknown |
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