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Statistics of closed paths in two-dimensional systems and negative magnetoresistance studied by computer simulation | | A. V. Germanenko
; V. A. Larionova
; G. M. Minkov
; S. A. Negashev
; I. V. Gornyi
; | | Date: |
15 Jul 1999 | | Subject: | Statistical Mechanics; Disordered Systems and Neural Networks | cond-mat.stat-mech cond-mat.dis-nn | | Abstract: | Statistics of closed paths in two-dimensional systems, which just determines the interference quantum correction to conductivity and anomalous magnetoconductance, has been studied by computer simulation of a particle motion over the plane with randomly distributed scatters. Both ballistic and diffusion regimes have been considered. The results of simulation have been analyzed in the framework of diffusion approximation. They are used for calculation of the magnetic field dependence of magnetoconductance in the model 2D system. It is shown that the anomalous magnetoconductance can be in principle described by the well known expression, obtained in the diffusion approximation, but with the prefactor less than unity and phase breaking which differs from true value. | | Source: | arXiv, cond-mat/9907219 | | Services: | Forum | Review | PDF | Favorites | |
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