Phase-fluctuation-induced reduction of the kinetic energy at the superconducting transition
T. Eckl, W. Hanke, E. Arrigoni
DOI 10.1103/PhysRevB.68.014505 · Physical Review B
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Abstract
Recent reflectivity measurements indicated a possible violation of the in-plane optical integral in the underdoped high-Tc compound Bi2Sr2CaCu2O8+δ up to frequencies much higher than expected by the standard BCS theory. The sum rule violation may be related to a loss of in-plane kinetic energy at the superconducting transition. Here, we show that a model based on phase fluctuations of the superconducting order parameter introduces a change of the in-plane kinetic energy at Tc. The change is due to a transition from a phase-incoherent Cooper-pair motion in the pseudogap regime above Tc to a phase-coherent motion at Tc.
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. | — | Pressure not reported | unknown |
| 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. | 10 | Pressure not reported | unknown |
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