In-plane electrodynamics of the superconductivity in Bi2Sr2CaCu2O8+δ: Energy scales and spectral weight distribution
A. F. Santander-Syro, R. P. S. M. Lobo, N. Bontemps, W. Lopera, D. Giratá, Z. Konstantinovic, Z. Z. Li, H. Raffy
DOI 10.1103/PhysRevB.70.134504 · Physical Review B
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Abstract
The in-plane infrared and visible (3meV–3eV) reflectivity of Bi2Sr2CaCu2O8+δ (Bi-2212) thin films is measured between 300K and 10K for different doping levels with unprecedented accuracy. The optical conductivity is derived through an accurate fitting procedure. We study the transfer of spectral weight from finite energy into the superfluid as the system becomes superconducting. In the overdoped regime, the superfluid develops at the expense of states lying below 60meV, which is a conventional energy of the order of a few times the superconducting gap. In the underdoped regime, spectral weight is removed from up to 2eV, far beyond any conventional scale. The intraband spectral weight change between the normal and superconducting state, if analyzed in terms of a change of kinetic energy, is ∼1meV. Compared to the condensation energy, this figure addresses the issue of a kinetic-energy driven mechanism.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 70 | Pressure not reported | zero_resistance |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | zero_resistance |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 63 | Pressure not reported | zero_resistance |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
| YBa2Cu3O7 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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