https://doi.org/10.1140/epjb/e20020050
Electron transport properties of MgB2 in the normal state
1
INFM/CNR, Dipartimento di Fisica, Via Dodecaneso 33, 16146 Genova, Italy
2
INFM, Dipartimento di Chimica e Chimica Industriale, Via Dodecaneso 31,
16146 Genova, Italy
3
Dipartimento di Chimica e Chimica Industriale, Via Dodecaneso 31, 16146
Genova, Sincrotrone di Trieste, Trieste
4
INFM Dipartimento di Fisica, Università di Cagliari, S.P.
Monserrato-Sestu Km 0.700, 09042 Monserrato (CA), Italy
Corresponding author: a putti@fisica.unige.it
Received:
16
November
2001
Revised:
21
December
2001
Published online: 15 February 2002
We report measurements of the resistivity, 
and the Seebeck
coefficient, S, of a MgB2 sintered sample, and compare S with
theoretical calculations based on precise electronic structure calculations.
is fitted well by a generalized Bloch-Grüneisen equation with a
Debye temperature 
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_{\rm c}<T<0.1\Theta _{R}$ follows the relationship AT+BT3. The phonon
drag term indicates a strong electron-phonon interaction. The diffusive
term, compared with calculations, suggests that 
bands give the
main contribution to the Seebeck effect.
PACS: 74.25.Fy – Transport properties (electric and thermal conductivity, thermoelectric effects, etc.) / 72.15.Jf – Thermoelectric and thermomagnetic effects / 74.70.Ad – Metals; alloys and binary compounds (including A15, Laves phases, etc.)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002
