Crossover from diffusive to strongly localized regime in two-dimensional systems

AM Somoza, J Prior, M Ortuno, Igor Lerner

Research output: Contribution to journalArticle

5 Citations (Scopus)


We have studied the conductance distribution function of two-dimensional disordered noninteracting systems in the crossover regime between the diffusive and the localized phases. The distribution is entirely determined by the mean conductance, >, in agreement with the strong version of the single-parameter scaling hypothesis. The distribution seems to change drastically at a critical value very close to one. For conductances larger than this critical value, the distribution is roughly Gaussian while for smaller values it resembles a log-normal distribution. The two distributions match at the critical point with an often appreciable change in behavior. This matching implies a jump in the first derivative of the distribution which does not seem to disappear as system size increases. We have also studied 1/> corrections to the skewness to quantify the deviation of the distribution from a Gaussian function in the diffusive regime.
Original languageEnglish
Pages (from-to)212201
Number of pages1
JournalPhysical Review B
Issue number21
Publication statusPublished - 1 Dec 2009


  • log normal distribution
  • Anderson model
  • Gaussian distribution
  • electrical conductivity transitions


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