Distribution of transmitted charge through a double-barrier junction

Details Distribution of transmitted charge through a double-barrier junction Distribution of transmitted charge through a double-barrier junction

1996-05-06

arxiv.org/abs/cond-mat/9605034v1

Phys. Rev. B 54, 8144 (1996)

Physics

Condensed Matter

6 pages, revtex, 2 figures included

Scientific paper

10.1103/PhysRevB.54.8144

The distribution function of transmitted charge through a double-barrier junction is studied at zero temperature and at small applied voltage. Both a semiclassical model, in which the transport is described by jump rates, and a quantum mechanical model, which averages over resonant and non-resonant states, are used to determine the characteristic function of the transmitted electrons. It is demonstrated that for large times the logarithm of the characteristic function is equal within the two approaches. The charge distribution is in between a Gaussian and a Poissonian distribution if both barriers have equal height and reduces to a Poissonian if one barrier is much higher than the other.

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