Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
86 (1999), S. 5103-5108
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Conductivity of wires with thickness less than the screening length is shown to be very sensitive to any kind of inhomogeneity causing a long-range carrier redistribution along the wire. This deviation from quasineutrality depends on the applied voltage and results in a nonlinear current–voltage characteristic and a noticeable frequency dispersion of the wire conductivity. These effects were analyzed in detail for the two different models: (i) wires with nonuniform doping, (ii) uniform wires separated from a contact by a short high-resistive (e.g., tunnel) region. The second model describes also the Coulomb blockade effects in wires. The effects can be large in spite of the large static capacity of wires, since at the high frequencies responsible for a Coulomb blockade, the capacity drops to the values comparable with those of quantum dots. © 1999 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.371486
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