Rashba effect in quantum networks

Details Rashba effect in quantum networks Rashba effect in quantum networks

2005-02-18

arxiv.org/abs/cond-mat/0502455v2

Phys. Rev. B 72, 075305 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages and 6 figures

Scientific paper

10.1103/PhysRevB.72.075305

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.

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