Fluxoid Quantum hc/2e Protected in an S-Wave Superconducting Ring
Keywords:
superconductor , Little-Parks effect , Aharonov-Bohm effectAbstract
Background and Objectives : A question of the possibility of the crossover of flux periodicity from the usual Little-Parks value of a fluxoid quantum hc/2e to a period hc/e when the radius of an s-wave superconducting ring is reduced, is examined in detail.
Methodology : The method of Gor’kov Green's function is employed to calculate the superconducting critical temperature equation. The numerical analysis is studied to explore the fluxoid crossover phenomenon.
Main Results : We study the phenomenon of fluxoid crossover both in the cases of large- and finite-radius limits and found a period of oscillation of the critical temperature is always given by hc/2e. The obtained results show the fluxoid is strictly quantized in units of hc/2e.
Conclusions : Our analysis provides the results contrast to the theoretical work of Wei-Goldbart in the context of a one-dimensional superconducting clean ring. The study enhances the proper understanding of flux periodicity and fluxoid quantization in the critical temperature of an s-wave superconducting ring threaded by magnetic flux.
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