Persistent currents with long-range hopping in 1D single-isolated-diffusive rings

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We show from exact calculations that a simple tight-binding Hamiltonian with diagonal disorder and long-range hopping integrals, falling off as a power $μ$ of the inter-site separation, correctly describes the experimentally observed amplitude (close to the value of an ordered ring) and flux-periodicity ($hc/e$) of persistent currents in single-isolated-diffusive normal metal rings of mesoscopic size. Long-range hopping integrals tend to delocalize the electrons even in the presence of disorder resulting orders of magnitude enhancement of persistent current relative to earliar predictions.
4 pages, 3 figures

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Mesoscale and Nanoscale Physics, Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/100331

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0409189
 http://arxiv.org/abs/cond-mat/0409189
 Synthetic Metals, Volume 155, Issue 2, 15 November 2005, Pages 430-433
 doi:10.1016/j.synthmet.2005.09.030

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arXiv