Strange behavior of persistent currents in small Hubbard rings

2003/10/31 by Santanu K. Maiti, J. Chowdhury, Jayeeta Chowdhury +2 · 1 citation
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum optics and atomic interactions #cond-mat.mes-hall #cond-mat.str-el

paper · pdf · doi:10.1016/j.physleta.2004.10.015

published as Phys. Lett. A, vol.332, pp.497-502 (2004) · 7 pages, 6 figures

openalex publication_date 2004/10/21 · arxiv created 2004/11/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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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