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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:05 |
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Conference: Bucharest University Faculty of Physics 2003 Meeting
Section: Atomic and Molecular Physics; Astrophysics
Title:
ELECTRON TRANSFER IN DISORDERED ONE-DIMENSIONAL SYSTEMS
Authors:
M.Elena , M.Bercu
Affiliation:
Faculty of Physics University of Bucharest
E-mail
Keywords:
Abstract:
The electron transfer throughout a 1D chain of barriers has been calculated taking
into account the transfer matrix for each barrier. The complex multiplication of the
matrix related to all barriers gives the total transparency of the chain. The spectrum
of the transmitted electrons versus energy has been calculated. The gaps between
the walls was assumed as a random variable. A random number generator has been built
to give the distribution of inter barrier distance which corresponds to the imposed
average and dispersion values. We have developed a code for the investigation of the
quasi-level distribution versus the disorder of the barrier chain. Order disorder transition
determines the degradation of the minibands mainly those placed at higher energy.
The current probability versus an external electric field has been calculated relative to
the imposed dispersion for inter-barrier distance.
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