Interacting electrons in the Aharonov-Bohm interferometer

Details Interacting electrons in the Aharonov-Bohm interferometer Interacting electrons in the Aharonov-Bohm interferometer

2008-03-31

arxiv.org/abs/0803.4303v1

Phys. Rev. B 77, 235304 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 7 figures

Scientific paper

10.1103/PhysRevB.77.235304

We present a microscopic picture of quantum transport in the Aharonov-Bohm (AB) interferometer taking into account electron interaction within the Hartree and the spin density functional theory approximations. We discuss the structure of the edge states for different number of the Landau levels in the leads, their coupling to the states in the central island and the formation of compressible/incompressible strips in the interferometer. Based on our results we discuss the existing theories of the unexpected AB periodicity, which essentially rely on specific phenomenological models of the states and their coupling in the interferometer. Our work provides a basis for such the theories, giving a detailed microscopic description of the propagating states and the global electrostatics in the system at hand.

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