Nano Archive

Multiple-path Quantum Interference Effects in a Double-Aharonov-Bohm Interferometer

Yang, X. F. and Liu, Y. S. (2010) Multiple-path Quantum Interference Effects in a Double-Aharonov-Bohm Interferometer. Nanoscale Research Letters, 5 (7). pp. 1228-1235.

[img]
Preview
PDF
897Kb

Official URL: http://www.springerlink.com/content/05537127l03317...

Abstract

We investigate quantum interference effects in a double-Aharonov-Bohm (AB) interferometer consisting of five quantum dots sandwiched between two metallic electrodes in the case of symmetric dot-electrode couplings by the use of the Green’s function equation of motion method. The analytical expression for the linear conductance at zero temperature is derived to interpret numerical results. A three-peak structure in the linear conductance spectrum may evolve into a double-peak structure, and two Fano dips (zero conductance points) may appear in the quantum system when the energy levels of quantum dots in arms are not aligned with one another. The AB oscillation for the magnetic flux threading the double-AB interferometer is also investigated in this paper. Our results show the period of AB oscillation can be converted from 2π to π by controlling the difference of the magnetic fluxes threading the two quantum rings.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:9359
Deposited By:JNCASR
Deposited On:01 Oct 2010 09:50
Last Modified:01 Oct 2010 09:50

Repository Staff Only: item control page