Strange behavior of persistent currents in small Hubbard rings

Details Strange behavior of persistent currents in small Hubbard rings Strange behavior of persistent currents in small Hubbard rings

2003-10-23

arxiv.org/abs/cond-mat/0310556v2

Phys. Lett. A, vol.332, pp.497-502 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 6 figures

Scientific paper

10.1016/j.physleta.2004.10.015

We show exactly that small Hubbard rings exhibit unusual kink-like structures
giving anomalous oscillations in persistent current. Singular behavior of
persistent current disappears in some cases. In half-filled systems mobility
gradually drops to zero with interaction, while it converges to some finite
value in non-half-filled cases.

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