Abstract : We report on magnetoconductance measurements of metallic networks of various sizes ranging from 10 to 106106 plaquettes, with anisotropic aspect ratio. Both Altshuler-Aronov-Spivak (AAS) h/2eh/2e periodic oscillations and Aharonov-Bohm (AB) h/eh/e periodic oscillations are observed for all networks. For large samples, the amplitude of both oscillations results from the incoherent superposition of contributions of phase coherent regions. When the transverse size becomes smaller than the phase coherent length LϕLϕ, one enters a new regime which is phase coherent (mesoscopic) along one direction and macroscopic along the other, leading to a new size dependence of the quantum oscillations.
Auteurs
Félicien Schopfer François Mallet D. Mailly 1 C. Texier 2, 3 G. Montambaux 3 Christopher Bäuerle 4 Laurent Saminadayar 5
1 LPN – Laboratoire de photonique et de nanostructures
2 LPTMS – Laboratoire de Physique Théorique et Modèles Statistiques
3 LPS – Laboratoire de Physique des Solides
4 QuantECA – Circuits électroniques quantiques Alpes
NEEL – Institut Néel
5 TPS – Thermodynamique et biophysique des petits systèmes
NEEL – Institut Néel
