Infrared synchrotron-radiation transmission measurements on YBa2Cu3O7- in the gap and supercurrent regions

G. P. Williams, R. C. Budhani, C. J. Hirschmugl, G. L. Carr, S. Perkowitz, B. Lou, T. R. Yang

Research output: Contribution to journalArticle

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Abstract

We report infrared synchrotron-radiation transmission measurements on 1-m-thick films of high-Tc YBa2Cu3O7- 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/ 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-bplane and c-axis properties.

Original languageEnglish
Pages (from-to)4752-4755
Number of pages4
JournalPhysical Review B
Volume41
Issue number7
DOIs
Publication statusPublished - 1990 Jan 1

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Phonons
Synchrotron radiation
Thick films
synchrotron radiation
Photons
Sampling
Infrared radiation
Substrates
thick films
phonons
sampling
low frequencies
vibration
conductivity
photons
barium copper yttrium oxide
energy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Infrared synchrotron-radiation transmission measurements on YBa2Cu3O7- in the gap and supercurrent regions. / Williams, G. P.; Budhani, R. C.; Hirschmugl, C. J.; Carr, G. L.; Perkowitz, S.; Lou, B.; Yang, T. R.

In: Physical Review B, Vol. 41, No. 7, 01.01.1990, p. 4752-4755.

Research output: Contribution to journalArticle

Williams, GP, Budhani, RC, Hirschmugl, CJ, Carr, GL, Perkowitz, S, Lou, B & Yang, TR 1990, 'Infrared synchrotron-radiation transmission measurements on YBa2Cu3O7- in the gap and supercurrent regions', Physical Review B, vol. 41, no. 7, pp. 4752-4755. https://doi.org/10.1103/PhysRevB.41.4752
Williams, G. P. ; Budhani, R. C. ; Hirschmugl, C. J. ; Carr, G. L. ; Perkowitz, S. ; Lou, B. ; Yang, T. R. / Infrared synchrotron-radiation transmission measurements on YBa2Cu3O7- in the gap and supercurrent regions. In: Physical Review B. 1990 ; Vol. 41, No. 7. pp. 4752-4755.
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