Mesoscopic effects in tunneling between parallel quantum wires

Daniel Boese, Michele Governale, Achim Rosch, and Ulrich Zülicke
Phys. Rev. B 64, 085315 – Published 7 August 2001
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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 Lt 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 one-dimensional–to–one-dimensional tunneling transport.

  • Received 18 March 2001

DOI:https://doi.org/10.1103/PhysRevB.64.085315

©2001 American Physical Society

Authors & Affiliations

Daniel Boese1, Michele Governale1, Achim Rosch2, and Ulrich Zülicke1

  • 1Institut für Theoretische Festkörperphysik, Universität Karlsruhe, D-76128 Karlsruhe, Germany
  • 2Institut für Theorie der Kondensierten Materie, Universität Karlsruhe, D-76128 Karlsruhe, Germany

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Issue

Vol. 64, Iss. 8 — 15 August 2001

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