Thermal diffusivity of superconducting YBa2Cu3O7−x
Gomes, L. ; Vieira, M. M. F. ; Baldochi, S. L. ; Lima, N. B. ; Novak, M. A. ; Vieira, N. D. ; Morato, S. P. ; Braga, A. J. P. ; Cesar, C. L. ; Penna, A. F. S. ; Filho, J. Mendes
[S.l.] : American Institute of Physics (AIP)
Published 1988
[S.l.] : American Institute of Physics (AIP)
Published 1988
| ISSN: |
1089-7550
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|---|---|
| Source: |
AIP Digital Archive
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| Topics: |
Physics
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| Notes: |
Thermal diffusivity results for superconducting YBa2Cu3O7−x systems are reported. Two laser excitation techniques were used: photoacoustic phase-lag and the flash method. We observed an anomalous jump in the thermal diffusivity at the critical temperature and related it to the electronic specific heat anomaly. This correlation yielded a characteristic phonon frequency of 320 cm−1 in the range of an active Raman mode already observed in a single crystal of the same compound. This result reinforces the current electron-phonon coupling mechanism as responsible for superconductivity.
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| Type of Medium: |
Electronic Resource
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| URL: |