Williams, G. P. ; Budhani, R. C. ; Hirschmugl, C. J. ; Carr, G. L. ; Perkowitz, S. ; Lou, B. ; Yang, T. R. (1990) Infrared synchrotron-radiation transmission measurements on YBa2Cu3O7-δin the gap and supercurrent regions Physical Review B, 41 (7). pp. 4752-4755. ISSN 0163-1829
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Official URL: http://prb.aps.org/abstract/PRB/v41/i7/p4752_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.41.4752
Abstract
We report infrared synchrotron-radiation transmission measurements on ~1-μm-thick films of high-Tc YBa2Cu3O7-δ from 40 to 290 cm-1 (5 to 36 meV). The films were deposited onto MgO substrates and showed resistive superconducting transitions with an onset at 83 K. Spectra below Tc show superconducting behavior, including the characteristic 1/ω supercurrent dependence for frequencies below 100 cm-1. The entire spectrum can be fit when a mattis-bardeen-type conductivity is included identifying increasing absorption beginning at a photon energy of 23 meV. However, a substantial residual absorption persists to the lowest measured frequencies. In addition, the appearance of phonons, some attributable to c-axis vibrations, suggests we are sampling a mixture of both a-b-plane and c-axis properties
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 5611 |
| Deposited On: | 19 Oct 2010 11:45 |
| Last Modified: | 23 May 2011 07:30 |
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