Upadhyayula V Varadaraju

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Upadhyayula V Varadaraju
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Upadhyayula V Varadaraju
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Varadaraju, Upadhyayula V.
Varadaraju, Upadhyayula
Varadaraju, U. V.
Varadaraju, Upadhyayula Venkata
Varadaraju, Upadhayayula V.
Varadaraju, U.
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    Enhancement of thermopower in the high T c superconductor YBa2Cu3O7 and related compounds
    (01-08-1987)
    Srinivasan, R.
    ;
    Sankaranarayanan V 
    ;
    Raju, N. P.
    ;
    Natarajan, S.
    ;
    Upadhyayula V Varadaraju 
    ;
    Subba Rao, G. V.
    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 to T 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. © 1987 Indian Academy of Sciences.