Rashba effect in quantum networks

Dario Bercioux, Michele Governale, Vittorio Cataudella, and Vincenzo Marigliano Ramaglia
Phys. Rev. B 72, 075305 – Published 2 August 2005

Abstract

We present a formalism to study quantum networks made up by single-channel quantum wires in the presence of Rashba spin-orbit coupling and magnetic field. In particular, linear transport through one-dimensional and two-dimensional finite-size networks is studied by means of the scattering formalism. In some particular quantum networks, the action of the magnetic field or of the Rashba spin-orbit coupling induces localization of the electron wave function. This phenomenon, which relies on both the quantum-mechanical interference and the geometry of the network, is manifested through the suppression of the conductance for specific values of the spin-orbit-coupling strength or of the magnetic field. Furthermore, the interplay of the Aharonov–Bohm phases and of the non-Abelian phases, introduced by spin-orbit coupling, is discussed in a number of cases.

    • Received 18 February 2005

    DOI:https://doi.org/10.1103/PhysRevB.72.075305

    ©2005 American Physical Society

    Authors & Affiliations

    Dario Bercioux1,2, Michele Governale3, Vittorio Cataudella2, and Vincenzo Marigliano Ramaglia2

    • 1Institut für Theoretische Physik, Universität Regensburg, D-93040, Germany
    • 2Coherentia-INFM and Dipartimento di Scienze Fisiche, Università degli Studi “Federico II,” I-80126 Napoli, Italy
    • 3NEST-INFM and Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy

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    Issue

    Vol. 72, Iss. 7 — 15 August 2005

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