The Periodicity of Persistent Currents in Mesoscopic Rings |
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| Authors: | Jian-Xin ZHU Z. D. WANG Chang-De GONG |
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| Affiliation: | 1. Department of Physics, University of Hong Kong, Pokfulam Road, Hong Kong;2. Department of Physics, Nanjing University, Nanjing 210008, China;3. Center of Theoretical Physics, CCAST (World Laboratory), Beijing 100080, China |
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| Abstract: | In a tight-binding model, we find that the equation of the Green's function in a onedimensional mesoscopic ring threaded by a Aharonov-Bohm (AB) flux can be exactly solved. From the poles of the Green's function, the eigenvalues are obtained and are periodic in the AB flux with period h/e. However, the periodicity of the persistent currents is determined by the number of electrons in the ring. |
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