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Transport Characteristics of Mesoscopic Radio-Frequency Single Electron Transistor |
| A. H. Phillips1;N. A. I. Aly2;K. Kirah1;H. E. El-Sayes2 |
| 1Faculty of Engineering, Ain-Shams University, Cairo, Egypt2Higher Technological Institute, Ramadan Tenth City, Egypt |
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| Cite this article: |
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A. H. Phillips, N. A. I. Aly, K. Kirah et al 2008 Chin. Phys. Lett. 25 250-253 |
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Abstract The transport property of a quantum dot under the influence of external time-dependent field is investigated. The mesoscopic device is modelled as semiconductor quantum dot coupled weakly to superconducting leads via asymmetric double tunnel barriers of different heights. An expression for the current is deduced by using the Landauer--Buttiker formula, taking into
consideration of both the Coulomb blockade effect and the magnetic field. It is found that the periodic oscillation of the current with the magnetic field is controlled by the ratio of the frequency of the applied ac-field to the electron cyclotron frequency. Our results show that the present device operates as a radio-frequency single electron transistor.
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| Keywords:
73.23.-b
73.40.-c
73.63.-b
85.35.-p
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Received: 15 October 2007
Published: 27 December 2007
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| PACS: |
73.23.-b
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(Electronic transport in mesoscopic systems)
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73.40.-c
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(Electronic transport in interface structures)
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73.63.-b
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(Electronic transport in nanoscale materials and structures)
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85.35.-p
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(Nanoelectronic devices)
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