Persistent Current in Metallic Rings and Cylinders

Abstract:

We explore the behavior of persistent current and low-field magnetic response in mesoscopic one-channel rings and multi-channel cylinders within the tight-binding framework. We show that the characteristic properties of persistent current strongly depend on total number of electrons , chemical potential μ, randomness and total number of channels. The study of low-field magnetic response reveals that only for one-channel rings with fixed , sign of the low-field currents can be predicted exactly, even in the presence of disorder. On the other hand, for multi-channel cylinders, sign of the low-field currents cannot be mentioned exactly, even in the perfect systems with fixed as it significantly depends on the choices of , μ, number of channels, disordered configurations, etc.

• Periodical: Solid State Phenomena (Volume 155)
• Pages: 87-104
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.155.87
• Online since: May 2009
• Authors: Santanu K. Maiti
• Keywords: Magnetic Susceptibility, Mesoscopic Cylinder, Mesoscopic Ring, Persistent Current

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