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Mesoscopic effects in tunneling between parallel quantum wires

Daniel Boese·Michele Governale·A. Rosch·U. Zuelicke
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Abstract

We consider a phase-coherent system of two parallel quantum wires that are coupled via a tunneling barrier of finite length. The usual perturbative treatment of tunneling fails in this case, even in the diffusive limit, once the length L of the coupling region exceeds a characteristic length scale L_t set by tunneling. Exact solution of the scattering problem posed by the extended tunneling barrier allows us to compute tunneling conductances as a function of applied voltage and magnetic field. We take into account charging effects in the quantum wires due to applied voltages and find that these are important for 1D-to-1D tunneling transport.

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Daniel Boese, Michele Governale, A. Rosch, U. Zuelicke. 2001-06-06. Mesoscopic effects in tunneling between parallel quantum wires. https://doi.org/10.1103/physrevb.64.085315

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