Electron transport properties of MgB 2 in the normal state
/ Authors
M.Putti, E. d'Agliano, D.Marre', F.Napoli, M.Tassisto, P.Manfrinetti, A.Palenzona, C.Rizzuto, S.Massidda . Infmcnr, D. Fisica
and 6 more authors
Genova, Italy., D. D. Chimica, Sincrotrone Trieste, I. D. D. Fisica, Cagliari
/ Abstract
We report measurements of the resistivity, ; and the Seebeck coecient, S; of aM gB 2 sintered sample, and compare S with theoretical calculations based on precise electronic structure calculations. is tted well by a generalized Bloch-Gruneisen equation with a Debye temperatureR of 1050 K.S is given by the sum of a diusive and a phonon drag term and the behavior in the temperature region Tc <T <0:1R follows the relationship AT +BT 3 . The phonon drag term indicates a strong electron-phonon interaction. The diusive term, compared with calculations, suggests that bands give the main contribution to the Seebeck eect.