Aharonov-Bohm effect for an exciton in a finite width nano-ring

Details Aharonov-Bohm effect for an exciton in a finite width nano-ring Aharonov-Bohm effect for an exciton in a finite width nano-ring

2005-05-06

arxiv.org/abs/cond-mat/0505151v2

Phys. Rev. B 72, 075343-10 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

28 pages, 12 figures

Scientific paper

10.1103/PhysRevB.72.075343

We study the Aharonov-Bohm effect for an exciton on a nano-ring using a 2D attractive fermionic Hubbard model. We extend previous results obtained for a 1D ring in which only azimuthal motion is considered, to a more general case of 2D annular lattices. In general, we show that the existence of the localization effect, increased by the nonlinearity, makes the phenomenon in the 2D system similar to the 1D case. However, the introduction of radial motion introduces extra frequencies, different from the original isolated frequency corresponding to the excitonic Aharonov-Bohm oscillations. If the circumference of the system becomes large enough, the Aharonov-Bohm effect is suppressed.

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