| Numéro |
J. Phys. I France
Volume 4, Numéro 3, March 1994
|
|
|---|---|---|
| Page(s) | 423 - 439 | |
| DOI | https://doi.org/10.1051/jp1:1994149 | |
J. Phys. I France 4 (1994) 423-439
Stability of the atomic magnetic moments in La 2-xSr xCuO 4 and effect of their fluctuations on the electronic density of states
T. Hocquet1, J.-P. Jardin2, P. Germain1 and J. Labbé11 Laboratoire de Physique de la Matière Condensée de l'Ecole Normale Supérieure, 24 rue Lhomond, 75231 Paris Cedex 05, France
2 Laboratoire PMTM (CNRS), Université Paris Nord, 93430 Villetaneuse, France
(Received 10 September 1993, accepted 29 November 1993)
Abstract
We calculate the band structure of the antiferromagnetic phase of
La
2-xSr
xCuO
4 in a bidimensional itinerant electron model.
Then, we discuss the stability of the antiferromagnetic phase and we
calculate the size of the atomic magnetic moments with respect
to the temperature and the doping ratio
x. We show that the
antiferromagnetic solution is in any case much more stable than
the ferromagnetic one. Finally, we give a description of the
antiferromagnetic fluctuations from which merges an explicit
physical meaning of the pseudo-gap found in the electronic
density of states. Implications for superconductivity are
proposed.
© Les Editions de Physique 1994