Fractional periodic persistent current in a twisted normal metal loop: an exact result

Details Fractional periodic persistent current in a twisted normal metal loop: an exact result Fractional periodic persistent current in a twisted normal metal loop: an exact result

2008-12-02

arxiv.org/abs/0812.0467v1

Journal of Computational and Theoretical Nanoscience, Volume 6, Number 1, January 2009, pp. 187-191(5)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 4 figures

Scientific paper

10.1166/jctn.2009.1025

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 $\phi_0/p$ ($\phi_0=ch/e$, the elementary flux-quantum) periodicity. Such fractional periodicity provides a new finding in the study of persistent current.

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