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Fractional Periodic Persistent Current in a Twisted Normal Metal Loop: An Exact Result

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We explore a novel mechanism for control of periodicity in persistent current in a twisted normal metal loop threaded by a magnetic flux &phi. A simple tight-binding model is used to describe the system. Quite interestingly we see that, depending on the number of twist p, the persistent current exhibits &phi0/p (&phi0 = ch/e, the elementary flux-quantum) periodicity. Such fractional periodicity provides a new finding in the study of persistent current.
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Keywords: FRACTIONAL PERIODICITY; IMPURITY; PERSISTENT CURRENT; TWISTED LOOP

Document Type: Research Article

Publication date: 2009-01-01

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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