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Enhancement of thermopower in the highT c superconductor YBa2Cu3O7 and related compounds

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Abstract

The absolute thermopower of single phase YBa2Cu3O7 and Y0.8Er0.2Ba2Cu3O7 has been measured in the range 250 K to the superconducting transition temperature. It is found that these compounds show a large enhancement of thermopower in the range 150 K down toT c. This enhancement shows a steep exponential drop as the temperature increases from the transition temperature. The temperature variation of the enhancement is too steep to be accounted for by electron-phonon or electron-local structural excitation mechanisms.

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Authors and Affiliations

  1. Department of Physics, Indian Institute of Technology, 600 036, Madras, India

    R Srinivasan, V Sankaranarayanan & N P Raju

  2. Material Science Research Centre, Indian Institute of Technology, 600 036, Madras, India

    R Srinivasan, V Sankaranarayanan, N P Raju, S Natarajan, U V Varadaraju & G V Subba Rao

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  1. R Srinivasan
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  2. V Sankaranarayanan
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  3. N P Raju
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  4. S Natarajan
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  5. U V Varadaraju
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  6. G V Subba Rao
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Srinivasan, R., Sankaranarayanan, V., Raju, N.P. et al. Enhancement of thermopower in the highT c superconductor YBa2Cu3O7 and related compounds. Pramana - J Phys 29, L225–L230 (1987). https://doi.org/10.1007/BF02845730

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  • DOI: https://doi.org/10.1007/BF02845730

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