Infrared studies of ab-plane oriented oxide superconductors
T. Timusk, S. L. Herr, K. Kamarás, C. D. Porter, D. B. Tanner, D. A. Bonn, J. D. Garrett, C. V. Stager, J. E. Greedan, M. Reedyk
DOI 10.1103/PhysRevB.38.6683 · Physical Review B
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Abstract
New results covering a wide frequency and temperature range are presented for the infrared properties of YBa2Cu3O7−δ for light polarized in the ab plane. The normal-state optical conductivity can be described by two processes: a low-frequency Drude absorption that tracks the temperature dependence of the dc conductivity and a temperature-independent midinfrared band. In the superconducting state most of the oscillator strength of the Drude absorption moves to zero frequency and the reflectance spectrum is dominated by a plasma edge at 500 cm−1. A superconducting gap cannot be seen in our spectra.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85 | Pressure not reported | unknown |
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