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 Mastodon Facebook X LinkedIn More