Strange behavior of persistent currents in small Hubbard rings

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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.
7 pages, 6 figures

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Mesoscale and Nanoscale Physics, Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/22520

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0310556
 http://arxiv.org/abs/cond-mat/0310556
 Phys. Lett. A, vol.332, pp.497-502 (2004)
 doi:10.1016/j.physleta.2004.10.015

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