Numéro
J. Phys. IV France
Volume 03, Numéro C2, Juillet 1993
International Workshop on Electronic Crystals
ECRYS - 93
Page(s) C2-155 - C2-158
DOI http://dx.doi.org/10.1051/jp4:1993231
International Workshop on Electronic Crystals
ECRYS - 93

J. Phys. IV France 03 (1993) C2-155-C2-158

DOI: 10.1051/jp4:1993231

One-dimensional electronic properties of the Bechgaard salts

K. PENC and F. MILA

Institut de Physique, Université de Neuchâtel, 1 rue Breguet, 2000 Neuchâtel, Switzerland


Abstract
An estimate of the gap [MATH] that opens at the Fermi level in a 3/4-filled Hubbard model with alternating hopping integrals is obtained on the basis of weak and strong coupling results. Assuming that this gap will induce a minimum of resistivity at a temperature[MATH], we show that the hopping integrals provided by quantum chemistry calculations based on structural data are in reasonable agreement with the experimental resistivity curves if U is the same for all compounds ([MATH]). In particular, very small values can be obtained for the TMTSF series without assuming that the dimerization is itself very small. The discrepancies between this model and the magnetic data are briefly discussed.



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