Coulomb blockade and transport in a chain of one-dimensional quantum dots
Thomas Nattermann
Institut fuer Theoretische Physik, Universitaet Koeln, 50937 Koeln, Germany
A long one-dimensional wire with a finite density of
strong random
impurities
is modelled as a chain of weakly coupled quantum dots. At low
temperature
T and applied voltage V its
resistance is limited by
“breaks”:
randomly occuring clusters of quantum dots with a special
length
distribution pattern that inhibits the transport. Due to the
interplay
of interaction and disorder effects the resistance can exhibit
T
and V
dependences that can be approximated by power laws. The
corresponding
two exponents differ greatly from each other and depend
not
only on the intrinsic electronic parameters but also on the impurity
distribution
statistics.
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