Félicien Schopfer 1, François Mallet 1, D. Mailly 2, C. Texier 3, 4, G. Montambaux 4, Christopher Bauerle 1, Laurent Saminadayar 1, 5, 6
Physical Review Letters 98 (2007) 026807
We report on magnetoconductance measurements of metallic networks of various sizes ranging from 10 to $10^{6}$ plaquettes, with anisotropic aspect ratio. Both Altshuler-Aronov-Spivak (AAS) $h/2e$ periodic oscillations and Aharonov-Bohm (AB) $h/e$ 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 $L_\phi$, 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.
- 1. Institut Néel (NEEL),
CNRS : UPR2940 – Université Joseph Fourier – Grenoble I – Institut National Polytechnique de Grenoble (INPG) - 2. Laboratoire de photonique et de nanostructures (LPN),
CNRS : UPR20 - 3. Laboratoire de Physique Théorique et Modèles Statistiques (LPTMS),
CNRS : UMR8626 – Université Paris XI – Paris Sud - 4. Laboratoire de Physique des Solides (LPS),
CNRS : UMR8502 – Université Paris XI – Paris Sud - 5. Université Joseph Fourier (Grenoble 1 UJF),
Université Joseph Fourier – Grenoble I - 6. Institut Universitaire de France (IUF),
Ministère de l’Enseignement Supérieur et de la Recherche Scientifique