AI Article Synopsis
- A long wire with random impurities behaves like a series of weakly connected quantum dots, affecting its resistance.
- At low temperatures and under voltage, resistance is constrained by rare clusters of quantum dots that disrupt electron flow.
- The resistance shows different power-law behaviors influenced by temperature and voltage, with two distinct exponents linked to electronic properties and impurity distribution.
Article Abstract
A long one-dimensional wire with a finite density of strong random impurities is modeled as a chain of weakly coupled quantum dots. At low temperature T and applied voltage V its resistance is limited by breaks: randomly occurring clusters of quantum dots with a special length distribution pattern that inhibit the transport. Because of 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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| http://dx.doi.org/10.1103/PhysRevLett.97.096601 | DOI Listing |
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