Rashba effect in quantum networks
Bercioux, Dario and Governale, Michele and Cataudella, Vittorio and Marigliano Ramaglia, Vincenzo (2005) Rashba effect in quantum networks. [Pubblicazione su rivista scientifica]
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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 onedimensional 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.
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