Magnetopolarizability at the Metal-Insulator Transition - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Access content directly
Journal Articles Physical Review Letters Year : 1995

Magnetopolarizability at the Metal-Insulator Transition


We have studied the ac response of a series of disordered YxSi1−x insulating samples in the vicinity of the metal-insulator transition. Far from the transition, the ac response is universal in frequency units scaled by a characteristic frequency, ωc≈g(ξc)C(ξc) governed by the critical conductance g(ξc) at the percolation threshold. A temperature-dependent characteristic field Bc∝T0.5, consistent with interference effects, is identified. As the transition is approached, intermediate frequency scales are stretched according to Δln(ωc)∝(T0T)14. We relate this stretching to the distribution of localization lengths at the transition.
Fichier principal
Vignette du fichier
PhysRevLett.75.3902.pdf (240.72 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

cea-01396483 , version 1 (14-11-2016)



Michael Specht, Laurent P. Lévy, F. Ladieu, M. Sanquer. Magnetopolarizability at the Metal-Insulator Transition. Physical Review Letters, 1995, 75 (21), pp.3902 - 3905. ⟨10.1103/PhysRevLett.75.3902⟩. ⟨cea-01396483⟩
44 View
110 Download



Gmail Facebook X LinkedIn More