Abstract
We carry out a comprehensive analysis of Fano effect in electronic transport process through a parallel double quantum dot (QD) structure. First, we establish an expression of the linear conductance in the standard Fano form. This expression provides a uniform way to explain the presence of the Fano antiresonance (or a lack of thereof) in various double QD structures. Then, by virtue of the language of Feynman path, we find that there are infinite electron transmission paths to contribute to the Fano interference. In the absence of a magnetic field, the high-order paths play a nontrivial role in the formation of the Fano lineshape. Finally, we find that it is possible to eliminate the contributions of all the high-order paths by tuning the magnetic field to some specific values. Thus, just two lowest-order Feynman paths remain. Only in such a case, the Fano effect can be unambiguously understood to arise from a quantum interference between a resonant and a nonresonant paths.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Physica E: Low-dimensional Systems and Nanostructures
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
