The energy spectrum and the persistent current in multi-channel rings
Man-Kit Yip; Ho-Fai Cheung; Man-Kit Yip; Department of Physics and Materials Science, City University of Hong Kong, Hong Kong; Ho-Fai Cheung; Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
Журнал:
Journal of Physics: Condensed Matter
Дата:
1997-06-23
Аннотация:
In this paper the correlation in the energy spectrum and the persistent current of multi-channel disordered rings threaded by an Aharonov - Bohm magnetic flux are studied. The correlations of the persistent currents are found to be not as strong as those in single-channel disordered rings. The results show that, for a tight-binding model with N sites on the circumference and M sites on the cross-sectional plane, there are at least N - 1 zero crossings of the single-level currents, and at least N - 2 zero crossings of the total currents at zero and high temperatures.
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