Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2001-10-19
Indian J. Physics. A, 77A(2), 119-123 (2003).
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4 pages, 5 eps figures. Based on the presentation (by C. B.) at the Condensed Matter Days-2001, held at Sambalpur University,
Scientific paper
Current enhancement- a novel quantum phenomena is found to occur in a mesoscopic hybrid ring at equilibrium. The hybrid system is described by a ring with bubble which is in turn coupled to a reservoir. In the system the ring encloses a magnetic flux $\Phi$ while the bubble does not enclose any flux. The novelty of this work lies in the fact that while earlier current enhancement was observed in non-equilibrium systems (e.g., a ring coupled to two reservoirs at different chemical potentials $\mu_{1}$ and $\mu_{2}$), herein we prove that current enhancement can also arise in equilibrium. In addition, we show that the closed system analog of our chosen open hybrid ring system violates parity effects. Finally, we bring to focus the discrepancy between the equilibrium magnetic moment (obtained via energy eigenvalues) and that calculated from the currents in the system.
Benjamin Colin
Jayannavar Arun M.
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