We report measurements of the resistivity, rho, and the Seebeck coefficient, S, of a MgB2 sintered sample, and compare S with theoretical calculations based on precise electronic structure calculations. rho is fitted well by a generalized Bloch-Gruneisen equation with a Debye temperature circle minus(R) of 1050 K. S is given by the sum of a, diffusive and a phonon drag term and the behavior in the temperature region T-c < T < 0.1circle minus(R) follows the relationship AT + BT3, The phonon drag term indicates a strong electron-phonon interaction. The diffusive term, compared with calculations, suggests that sigma bands give the main contribution to the Seebeck effect.
Electron transport properties of MgB2 in the normal state
PUTTI, MARINA;GALLEANI D'AGLIANO, ENRICO;MARRE', DANIELE;MANFRINETTI, PIETRO;
2002-01-01
Abstract
We report measurements of the resistivity, rho, and the Seebeck coefficient, S, of a MgB2 sintered sample, and compare S with theoretical calculations based on precise electronic structure calculations. rho is fitted well by a generalized Bloch-Gruneisen equation with a Debye temperature circle minus(R) of 1050 K. S is given by the sum of a, diffusive and a phonon drag term and the behavior in the temperature region T-c < T < 0.1circle minus(R) follows the relationship AT + BT3, The phonon drag term indicates a strong electron-phonon interaction. The diffusive term, compared with calculations, suggests that sigma bands give the main contribution to the Seebeck effect.
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