Impact of Weak Localization in the Time Domain

S. K. Cheung, X. Zhang, Z. Q. Zhang, A. A. Chabanov, and A. Z. Genack
Phys. Rev. Lett. 92, 173902 – Published 30 April 2004

Abstract

We find a renormalized “time-dependent diffusion coefficient,” D(t), for pulsed excitation of a nominally diffusive sample by solving the Bethe-Salpeter equation with recurrent scattering. We observe a crossover in dynamics in the transformation from a quasi-1D to a slab geometry implemented by varying the ratio of the radius, R, to the length, L, of the cylindrical sample with reflecting side walls and open ends. Immediately after the peak of the transmitted pulse, D(t) falls linearly with a nonuniversal slope that approaches an asymptotic value for R/L1. The value of D(t) extrapolated to t=0 depends only upon the dimensionless conductance g for R/L1 and only upon k0 for R/L1, where k is the wave vector and 0 is the bare mean free path.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 7 November 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.173902

©2004 American Physical Society

Authors & Affiliations

S. K. Cheung1, X. Zhang1, Z. Q. Zhang1, A. A. Chabanov2, and A. Z. Genack2

  • 1Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
  • 2Department of Physics, Queens College of the City University of New York, Flushing, New York 11367, USA

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 92, Iss. 17 — 30 April 2004

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×