Transport Properties of Quantum Interference Devices the Role of the Andreev Bound States | ||||
| Egyptian Journal of Solids | ||||
| Article 1, Volume 25, Issue 1, 2002, Page 1-11 PDF (92.31 K) | ||||
| DOI: 10.21608/ejs.2002.150457 | ||||
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| Abstract | ||||
| Quantum transport characteristic of a mesoscopic systems under the effect of Coulomb blocked and magnetic field are studied. This system is modeled as two semiconductor quantum dots which are coupled to a superconducting lead via quantum point contacts. The Josephson current density has been obtained in terms of the Andreev reflection amplitude. This Andreev reflection amplitude was deduced by solving the Bogoliubov – de Gennes (BdG) equation, describing the electron transport through the present studied junction. Numerical calculation of the obtained current density has been performed. The dependence of the current density on phase angle φ shows a periodic variation. While the oscillation features of the current density with the magnetic field are predicted to be due to quantum interference of electron waves. So such junction can be operated as a quantum interference tuner which may be valuable for nanotechnology. | ||||
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