Frequency-dependent relaxation rate in superconducting YBa2Cu3O6+δ
A. Pimenov, A. Loidl, G. Jakob, H. Adrian
DOI 10.1103/PhysRevB.61.7039 · Physical Review B
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Abstract
The submillimeter-wave 3 cm−1<ν<40 cm−1 complex conductivity of the reduced YBa2Cu3O6+δ film (TC=56.5 K) was investigated for temperatures 4 K<T<300 K and compared to the properties of the same film in the optimally doped state. The frequency dependence of the effective quasiparticle scattering rate 1/τ*(ν) was extracted from the spectra. 1/τ* is shown to be frequency independent at low frequencies and high temperatures. A gradual change to 1/τ*∝ν1.75±0.3 law is observed as temperature decreases. In order to explain the observed temperature dependence of the low frequency spectral weight above Tc, the quasiparticle effective mass is supposed to be temperature dependent for T>Tc.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 56.5 | Pressure not reported | onset |
| YBa2Cu3O6.7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 56.5 | Pressure not reported | onset |
| YBa2Cu3O6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89.5 | Pressure not reported | unknown |
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