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Period Halving of Persistent Currents in Mesoscopic Möbius Ladders |
| DENG Wen-Ji1;XU Ji-Huan1;LIU Ping2 |
| 1Department of Physics, South China University of Technology, Guangzhou 510641
2Research Institute of Materials Science, South China University of Technology, Guangzhou 510641 |
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| Cite this article: |
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DENG Wen-Ji, XU Ji-Huan, LIU Ping 2002 Chin. Phys. Lett. 19 988-990 |
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Abstract We investigate the period halving of persistent currents (PCs) of non-interacting electrons in isolated mesoscopic Möbius ladders without disorder, pierced by Aharonov-Bohm flux. The mechanisms of the period halving effect depend on the parity of the number of electrons as well as on the interchain hopping. Although the data of PCs in mesoscopic systems are sample-specific, some simple rules are found in the canonical ensemble average, for example, all the odd harmonics of the PCs disappear and the signals of even harmonics are non-negative.
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| Keywords:
73.23.Ra
73.23.-b
68.65.-k
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Published: 01 July 2002
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| PACS: |
73.23.Ra
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(Persistent currents)
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73.23.-b
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(Electronic transport in mesoscopic systems)
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68.65.-k
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(Low-dimensional, mesoscopic, nanoscale and other related systems: structure and nonelectronic properties)
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