Far-Infrared Conductivity of the High-Tc Superconductor YBa2Cu3O7
D. A. Bonn, J. E. Greedan, C. V. Stager, T. Timusk, M. G. Doss, S. L. Herr, K. Kamarás, D. B. Tanner
DOI 10.1103/PhysRevLett.58.2249 · Physical Review Letters
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Abstract
We present reflectance data for the high-temperature superconductor YBa2Cu3O7, and the Kramers-Kronig-transformed conductivity from 50 to 900 cm−1. There is a rich phonon structure with peaks at 151, 191, 279, 310, 548, and 609 cm−1. The continuous background is Drude type at high temperature but below the superconducting transition there is a region of suppressed conductivity consistent with a superconducting gap with the weak-coupling BCS value. Also associated with superconductivity are changes to the low-lying phonons and a plasma-type edge at 60 cm−1.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | onset |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89 | Pressure not reported | midpoint |
| La1.85Sr0.15CuO4 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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