Quasiparticle dynamics in overdoped Bi1.4Pb0.7Sr1.9CaCu2O8+δ: Coexistence of superconducting gap and pseudogap below Tc
Saritha K. Nair, Xingquan Zou, Elbert E. M. Chia, Jian-Xin Zhu, C. Panagopoulos, S. Ishida, S. Uchida
DOI 10.1103/PhysRevB.82.212503 · Physical Review B
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Abstract
Photoexcited quasiparticle relaxation dynamics in overdoped Bi2Sr2CaCu2O8+δ (Tc=65 K, hole doping p=0.22) single crystal is investigated as a function of temperature. We provide evidence of a ∼22 meV pseudogap (T∗≈100 K) at this doping level. Moreover, this pseudogap vanishes at T∗. Our data support the scenario where both the superconducting gap and pseudogap coexist in the superconducting state. Our results also suggest an increased scattering rate between electrons and spin fluctuations as the sample enters the pseudogap phase.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi1.4Pb0.7Sr1.9CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 65 | Pressure not reported | midpoint |
| Bi1.4Pb0.7Sr1.9CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 68 | Pressure not reported | onset |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 65 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 56 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 74.3 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 82 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 86 | Pressure not reported | unknown |
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