Transport through a quantum wire with a side quantum-dot array

Details Transport through a quantum wire with a side quantum-dot array Transport through a quantum wire with a side quantum-dot array

2002-10-26

arxiv.org/abs/cond-mat/0210589v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures, submitted to PRB

Scientific paper

10.1103/PhysRevB.67.085321

A noninteracting quantum-dot array side-coupled to a quantum wire is studied. Transport through the quantum wire is investigated by using a noninteracting Anderson tunneling Hamiltonian. The conductance at zero temperature develops an oscillating band with resonances and antiresonances due to constructive and destructive interference in the ballistic channel, respectively. Moreover, we have found an odd-even parity in the system, whose conductance vanishes for an odd number of quantum dots while becomes $2e^2/h$ for an even number. We established an explicit relation between this odd-even parity, and the positions of the resonances and antiresonances of the conductivity with the spectrum of the isolated QD array

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